Determine Number Characteristics

In this challenge, you will create a function that determines the characteristics of a given number. Specifically, the function will evaluate whether a number is positive negative, or zero and also determine if it is even or odd.

Rust's powerful control flow mechanisms, including if, else if, and else statements, make it easy to handle multiple conditions. By combining these conditions with logical operators, you can create a function that provides comprehensive information about the number.

Your task

You are given a function describe_number(n: i32) -> String that takes an integer as input and returns a string description of the number's characteristics. The description should include whether the number is positive, negative, or zero and whether it is even or odd.

For example:

"Positive even"
"Positive odd"
"Negative even"
"Negative odd"
"Zero"

Complete the function by implementing the necessary conditions and logical checks.

Requirements

If the number is positive and even, return "Positive even".
If the number is positive and odd, return "Positive odd".
If the number is negative and even, return "Negative even".
If the number is negative and odd, return "Negative odd".
If the number is zero, return "Zero".

Example

let result = describe_number(10);
assert_eq!(result, "Positive even");
 
let result = describe_number(-3);
assert_eq!(result, "Negative odd");
 
let result = describe_number(0);
assert_eq!(result, "Zero");

Hints

Remember that the modulus operator % can help determine if a number is even or odd.
Logical operators && and || will be useful for combining conditions.
Consider the order of your conditions to ensure the correct output.

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Solutions

Ayushman Rathore

Spartan09

8 hours ago

3.66ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match (0 == n, n < 0, 0 == n % 2) {
		(true, _, _) => "Zero".to_string(),
		(_, true, false) => "Negative odd".to_string(),
		(_, true, true) => "Negative even".to_string(),
		(_, false, false) => "Positive odd".to_string(),
		(_, false, true) => "Positive even".to_string()
	}
}

Lucas Deprit

lucasdeprit

8 hours ago

7.96ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match n {
        n if n > 0 => { 
            if even(n) {return String::from("Positive even");}
            return String::from("Positive odd");
        },
        n if n < 0 => {
            if even(n) {return String::from("Negative even");}
            return String::from("Negative odd");
        },
        _ => String::from("Zero"),
    }
}
    fn even(n: i32) -> bool {
        if n % 2 == 0 { return true; }
        false
    }

Lucas Deprit

lucasdeprit

8 hours ago

3.37ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match n {
        n if n > 0 => { 
            if even(n) {return String::from("Positive even");}
            return String::from("Positive odd");
        },
        n if n < 0 => {
            if even(n) {return String::from("Negative even");}
            return String::from("Negative odd");
        },
        _ => String::from("Zero"),
    }
}
    fn even(n: i32) -> bool {
        if n % 2 == 0 { return true; }
        false
    }

Lucas Deprit

lucasdeprit

8 hours ago

3.69ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match n {
        0 => String::from("Zero"),
        n if n % 2 == 0 => { 
            if n > 0 {return String::from("Positive even");}
            return String::from("Negative even");
        },
        _ => {
            if n > 0 {return String::from("Positive odd");}
            return String::from("Negative odd");
        }
    }
}

manuelmj

2 days ago

3.35ms

81.58kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n {
        n if n > 0 => String::from(format!("Positive {}", if even_or_odd(n){"even"} else {"odd"})),
        n if n < 0 => String::from(format!("Negative {}", if even_or_odd(n){"even"} else {"odd"})),
            
        _ => String::from("Zero"),  
    }
}
fn even_or_odd(number : i32)-> bool {
    if number % 2 == 0 {
        return true 
    }
    false 
}

Éric Villani

TheTrueCaligari

7 days ago

4.18ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n>0 {
        if n % 2 == 0 {
            "Positive even".to_string()
        } else {
            "Positive odd".to_string()
        } 
    } else if n<0 {
        if n % 2 == 0 {
            "Negative even".to_string()
        } else {
            "Negative odd".to_string()
        } 
    } else {
        "Zero".to_string()
    }
}

Yi Hao

leongyihao

8 days ago

3.38ms

87.35kb

pub fn describe_number(n: i32) -> String {
	match (0 == n, n < 0, 0 == n % 2) {
		(true, _, _) => "Zero".to_string(),
		(_, true, false) => "Negative odd".to_string(),
		(_, true, true) => "Negative even".to_string(),
		(_, false, false) => "Positive odd".to_string(),
		(_, false, true) => "Positive even".to_string()
	}
}

Jordan

Jordan-Haidee

11 days ago

4.96ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n {
        x if x > 0 && x % 2 == 0 => "Positive even".to_owned(),
        x if x > 0 && x % 2 != 0 => "Positive odd".to_owned(),
        x if x < 0 && x % 2 == 0 => "Negative even".to_owned(),
        x if x < 0 && x % 2 != 0 => "Negative odd".to_owned(),
        _ => "Zero".to_owned(), 
    }
}

Nikita Smirnov

Nismirno

12 days ago

4.51ms

87.35kb

pub fn describe_number(n: i32) -> String {
    let mut res = String::new();
    if n == 0 {
        return "Zero".to_string();
    }
    if n > 0 {
        res.push_str("Positive");
    } else {
        res.push_str("Negative");
    }
    if n % 2 == 0 {
        res.push_str(" even");
    } else {
        res.push_str(" odd");
    }
    res
}

Nikita Smirnov

Nismirno

12 days ago

4.36ms

87.35kb

pub fn describe_number(n: i32) -> String {
    let mut res = String::new();
    if n == 0 {
        return "Zero".to_string();
    }
    if n > 0 {
        res.push_str("Positive");
    } else {
        res.push_str("Negative");
    }
    if n % 2 == 0 {
        res.push_str(" even");
    } else {
        res.push_str(" odd");
    }
    res
}

Christopher Nielson

c-nielson

15 days ago

2.92ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {
        return String::from("Zero");
    }
    let parity = if n > 0 { "Positive" } else { "Negative" };
    let evenness = match n % 2 {
        0 => "even",
        _ => "odd"
    };
    format!("{parity} {evenness}").into()
}

SeinPierre

16 days ago

3.12ms

81.58kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n {
        ..=-1 => format!("Negative {}", if n % 2 == 0 {
                "even"
            } else{
                "odd"
            }),
        0 => "Zero".to_string(),
        1.. => format!("Positive {}", if n % 2 == 0 {
                "even"  
            } else{
                "odd"
            })
    }
}

SeinPierre

16 days ago

3.43ms

87.36kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n{
        ..=-1 => format!("Negative {}",even_or_odd(n)),
        0 => String::from("Zero"),
        1.. => format!("Positive {}",even_or_odd(n)),
    }
}
pub fn even_or_odd(n: i32) -> String{
    match n % 2 == 0 {
        false => String::from("odd"),
        true => String::from("even"),
    }
}

Donald Huber-Youmans

dHuberYoumans

17 days ago

3.13ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here 
    if n == 0 {
        return "Zero".to_string();
    } else {
        match (n > 0, n%2==0) {
            (true, true) => "Positive even".to_string(),
            (true, false) => "Positive odd".to_string(),
            (false, true) => "Negative even".to_string(),
            (false, false) => "Negative odd".to_string(),
        }
    }
}

Elliott Draper

ejdraper

19 days ago

3.09ms

87.35kb

pub fn describe_number(n: i32) -> String {
    let even = n % 2 == 0;
    let positive = n > 0;
    let zero = n == 0;
    if positive && even {
        "Positive even".to_string()
    } else if positive && !even {
        "Positive odd".to_string()
    } else if !positive && even && !zero {
        "Negative even".to_string()
    } else if !positive && !even {
        "Negative odd".to_string()
    } else {
        "Zero".to_string()
    }
}

Whisper_icoma

1378046967

19 days ago

3.51ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        "Zero".to_string()
    } else if n > 0 {
        if n & 1 == 1 {
            "Positive odd".to_string()
        } else {
            "Positive even".to_string()
        }
    } else {
        if n & 1 == 1 {
            "Negative odd".to_string()
        } else {
            "Negative even".to_string()
        }
    }
}

0xMushow

19 days ago

3.70ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string();
    } else if n > 0 {
        if n % 2 == 0 {
            return "Positive even".to_string();
        }
        return "Positive odd".to_string();
    } else {
        if n % 2 == 0 {
            return "Negative even".to_string();
        }
       return "Negative odd".to_string();
    }
}

エヴァンゲリオン

Lu-zihang

22 days ago

3.79ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    let mut res = String::new();
    match n {
        _ if n > 0 => res.push_str("Positive "),
        _ if n < 0 => res.push_str("Negative "),
        _ if n == 0 => res.push_str("Zero"),
        _ => (),
    }
    if n != 0 {
        match n % 2 {
            0 => res.push_str("even"),
            _ => res.push_str("odd"),
        }
    }
    res
}

Sthitaprajna Sahu

sthitasahu

24 days ago

3.27ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {
        return "Zero".to_string();
    }
    else  if n > 0 && n % 2 == 0 {
        return "Positive even".to_string();
    }
    else if n > 0 && n % 2 != 0 {
        return "Positive odd".to_string();
    }
    else if n < 0 && n % 2 == 0 {
        return "Negative even".to_string();
    }
    else {
        return "Negative odd".to_string();
    }
   
}

Florian Gaudin-Delrieu

FlorianGD

24 days ago

3.19ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {
        "Zero".to_string()
    }
    else { 
        match (n > 0, n % 2 == 0) {
            (true, true) => "Positive even".to_string(),
            (true, false) => "Positive odd".to_string(),
            (false, true) => "Negative even".to_string(),
            (false, false) => "Negative odd".to_string(),
        }
    }
}

Takuro Niitsuma

otakumesi

a month ago

6.39ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string()
    }
    let posneg = if n > 0 { "Positive" } else { "Negative" };
    let evenoddd = if n % 2 == 0 { "even" } else { "odd" };
    [
        posneg,
        evenoddd,
    ].join(" ")
}

dawwestk

a month ago

6.19ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        "Zero".to_string()
    } else if n > 0 {
        if n & 1 == 1 {
            "Positive odd".to_string()
        } else {
            "Positive even".to_string()
        }
    } else {
        if n & 1 == 1 {
            "Negative odd".to_string()
        } else {
            "Negative even".to_string()
        }
    }
}

PangoSea

kapaseker

a month ago

2.99ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        "Zero".to_string()
    } else if n > 0 {
        if n % 2 == 0 {
            "Positive even".to_string()
        } else {
            "Positive odd".to_string()
        }
    } else {
        if n % 2 == 0 {
            "Negative even".to_string()
        } else {
            "Negative odd".to_string()
        }
    }
}

Tengz Mao

MaoX-Yu

a month ago

3.88ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string();
    }
    let even = n % 2 == 0;
    let positive = n > 0;
    match (even, positive) {
        (true, true) => "Positive even".to_string(),
        (true, false) => "Negative even".to_string(),
        (false, true) => "Positive odd".to_string(),
        (false, false) => "Negative odd".to_string(),
    }
}

Sakura

sakkura

a month ago

3.31ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        "Zero"
    } else if n > 0 {
        if n % 2 == 0 {
            "Positive even"
        } else {
            "Positive odd"
        }
    } else {
        if n % 2 == 0 {
            "Negative even"
        } else {
            "Negative odd"
        }
    }.to_string()
}

Ahmet Özcan

ahmetoozcan

a month ago

3.26ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    let mut res = String::new();
    match n {
        0 => res.push_str("Zero"),
        1..=i32::MAX => res.push_str("Positive "),
        i32::MIN..=-1 => res.push_str("Negative "),
    }
    if n != 0 {
        match n % 2 {
            0 => res.push_str("even"),
            _ => res.push_str("odd"),
        }
    }
    res
}

Ahmet Özcan

ahmetoozcan

a month ago

4.08ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    let mut res = String::new();
    match n {
        _ if n > 0 => res.push_str("Positive "),
        _ if n < 0 => res.push_str("Negative "),
        _ if n == 0 => res.push_str("Zero"),
        _ => (),
    }
    if n != 0 {
        match n % 2 {
            0 => res.push_str("even"),
            _ => res.push_str("odd"),
        }
    }
    res
}

mm-yyyy

a month ago

3.46ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    let mut s = match n {
        0 => "Zero".to_string(),
        0..=i32::MAX => "Positive".to_string(),
        i32::MIN..=-1 => "Negative".to_string(),
    };
    if &n % 2 != 0 { s = s + " odd" } else if n != 0 { s = s + " even"}
    s
}

Bugra Okumus

bgraokmush

a month ago

3.06ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {return "Zero".to_string();}
    
    if n > 0 {
        if n % 2 == 0 {return "Positive even".to_string();}
        else {return "Positive odd".to_string();}
    }
    else {
        if n % 2 == 0 {return "Negative even".to_string();}
        else {return "Negative odd".to_string();}
    }
}

Mikhail Shutov

mshutov

a month ago

4.01ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {return "Zero".to_string();}
    let even_or_odd: &str;
    if n % 2 == 0 {even_or_odd = "even";} else {even_or_odd = "odd";}
    let sign: &str;
    if n > 0 {sign = "Positive";} else {sign = "Negative";}
    format!("{sign} {even_or_odd}")
}

Dominicm99

a month ago

3.72ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {return "Zero".to_string();}
    let mut output = String::new();
    if n > 0 {
        output.push_str("Positive ");
    } else {
        output.push_str("Negative ");
    }
    if n % 2 == 0 {
        output.push_str("even");
    } else {
        output.push_str("odd");
    }
    return output;
}

vikingNR

a month ago

3.15ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match (n == 0, n.is_positive(), n % 2 == 0){
        (true, _, _) => "Zero".to_string(),
        (false, true, true) => "Positive even".to_string(),
        (false, true, false) => "Positive odd".to_string(),
        (false, false, true) => "Negative even".to_string(),
        (false, false, false) => "Negative odd".to_string()
    }
    // TODO: Implement the function here
}

nedrw

a month ago

3.30ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n {
        i if i == 0 => "Zero",
        i if i > 0 && i % 2 == 0 => "Positive even",
        i if i > 0 && i % 2 != 0 => "Positive odd",
        i if i < 0 && i % 2 == 0 => "Negative even",
        i if i < 0 && i % 2 != 0 => "Negative odd",
        _ => "",
    }.to_string()
}

Infinite Time

InfiniteTime3000

a month ago

3.53ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string();
    }
    
    if n > 0 {
        if n % 2 == 0 {
            return "Positive even".to_string();
        } else {
            return "Positive odd".to_string();
        }
    } else {
        if n % 2 == 0 {
            return "Negative even".to_string();
        } else {
            return "Negative odd".to_string();
        }
    }
}

matsuyama-k1

a month ago

3.27ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    let is_positive = n > 0;
    let is_even = n % 2 == 0;
    let is_zero = n == 0;
    if is_zero {
        return "Zero".to_string();
    }
    if is_positive {
        if is_even {
            return "Positive even".to_string();
        } else {
            return "Positive odd".to_string();
        }
    } else {
        if is_even {
            return "Negative even".to_string();
        } else {
            return "Negative odd".to_string();
        }
    }
}

PavelPerna

a month ago

3.19ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    let (sign,even,zero) =  (n > 0, n % 2 == 0, n == 0);
    let mut r = String::from("Zero");
    if !zero {
        if sign { 
            r=String::from("Positive"); 
        } else {
            r=String::from("Negative");
        }
        if even {
            r+=" even";
        }else{
            r+=" odd";
        }
    }
    r
}

rawar089

a month ago

3.62ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 { return "Zero".to_string()}
    match ( n > 0, n % 2 == 0) {
        (true, true)   => "Positive even".to_string(),
        (true, false)  => "Positive odd".to_string(),
        (false, true)  => "Negative even".to_string(),
        (false, false) => "Negative odd".to_string(),
    }
}

Vlad

mvldmihai

a month ago

3.00ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n > 0 && n % 2 == 0 {
        "Positive even".to_string()
    } else if n > 0 && n % 2 != 0 {
        "Positive odd".to_string()
    } else if n < 0 && n % 2 == 0 {
        "Negative even".to_string()
    } else if n < 0 && n % 2 != 0 {
        "Negative odd".to_string()
    } else {
        "Zero".to_string()
    }
}

Stan

i2z4

a month ago

4.23ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {
        return "Zero".to_string()
    }
    let parity = if n % 2 == 0 { "even" } else { "odd" };
    let sign = if n > 0 { "Positive" } else { "Negative" };
    format!("{} {}", sign, parity)
}

zahrajavar

a month ago

4.48ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n==0{
       return "Zero".to_string();
    }
    match (n>0 , n%2 == 0) {
        (true, false)=> "Positive odd".to_string(),
        (true, true) => "Positive even".to_string(),
        (false, true) => "Negative even".to_string(),
        (false, false) => "Negative odd".to_string(),
    }
}

goerfra

a month ago

3.47ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 { return String::from("Zero")}
    
    let mut result: String = String::from("");
    if n < 0 {
        result += "Negative";
    } else {
        result += "Positive";
    }
    match n % 2 == 0 {
        true => result += " even",
        false => result += " odd"
    }
    result
}

L-Super

a month ago

3.20ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match (n, n % 2 == 0) {
        (0, _) => "Zero".to_string(),
        (x, true) if x > 0 => "Positive even".to_string(),
        (x, false) if x > 0 => "Positive odd".to_string(),
        (_, true) => "Negative even".to_string(),
        (_, false) => "Negative odd".to_string(),
    }
}

Kamuran

karapy

a month ago

3.36ms

87.35kb

pub fn describe_number(n: i32) -> String {
    if n == 0 {
        return String::from("Zero");
    }
    if n > 0 {
        if n % 2 == 0 {
            return String::from("Positive even");
        } else {
            return String::from("Positive odd");
        }
    } else {
        if n % 2 == 0 {
            return String::from("Negative even");
        } else {
            return String::from("Negative odd");
        }
    }
}

Larry Oates

Leafmun-certii

a month ago

4.97ms

81.58kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n {
        ..=-1 => format!("Negative {}", if n % 2 == 0 {
                "even"
            } else{
                "odd"
            }),
        0 => "Zero".to_string(),
        1.. => format!("Positive {}", if n % 2 == 0 {
                "even"  
            } else{
                "odd"
            })
    }
}

facat

a month ago

4.38ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    match n {
        n if n > 0 => if n % 2 == 0 {return "Positive even".to_string();} else {return "Positive odd".to_string();},
        n if n < 0 => if n % 2 == 0 {return "Negative even".to_string();} else {return "Negative odd".to_string();},
        _ => return "Zero".to_string()
    }
}

Yofifi

a month ago

3.33ms

87.35kb

pub fn describe_number(n: i32) -> String {
    match n {
        n if n > 0 => if n % 2 == 0 {return "Positive even".to_string();} else {return "Positive odd".to_string();},
        n if n < 0 => if n % 2 == 0 {return "Negative even".to_string();} else {return "Negative odd".to_string();},
        _ => return "Zero".to_string()
    }
}

aey4

a month ago

6.30ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string();
    }
    return match (n > 0, n % 2 == 0){
        (true, true) => "Positive even".to_string(),
        (true, false) => "Positive odd".to_string(),
        (false, true) => "Negative even".to_string(),
        (false, false) => "Negative odd".to_string() 
    }
}

Tarokc

a month ago

3.13ms

87.36kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string()
    }
    let mut string: String = "".to_string();
    if n > 0 {
        string.push_str("Positive")
    }
    else {
        string.push_str("Negative")
    }
    if n % 2 == 0 {
        string.push_str(" even")
    }
    else {
        string.push_str(" odd")
    }
    return string.to_string()
}

viky

vikyw89

a month ago

3.40ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string();
    }
    let is_positive = n > 0;
    let is_even: bool = n % 2 == 0;
    if is_even && is_positive {
        return "Positive even".to_string();
    } else if is_even && !is_positive {
        return "Negative even".to_string();
    } else if !is_even && is_positive {
        return "Positive odd".to_string();
    } else {
        return "Negative odd".to_string();
    }
}

Caio César

caiocdcs

a month ago

2.90ms

87.35kb

pub fn describe_number(n: i32) -> String {
    // TODO: Implement the function here
    if n == 0 {
        return "Zero".to_string();
    }
    
    if n > 0 {
        if n % 2 == 0 {
            return "Positive even".to_string();
        } else {
            return "Positive odd".to_string();
        }
    } else {
        if n % 2 == 0 {
            return "Negative even".to_string();
        } else {
            return "Negative odd".to_string();
        }
    }
}