Weekday from Number

In this challenge, you will use Rust's pattern matching capabilities to determine the name of a weekday given its corresponding number. Each day of the week will be represented by a number from 1 to 7, where 1 corresponds to Monday and 7 corresponds to Sunday.

This is a common task that can be very useful in various applications, such as scheduling systems or calendar utilities. You will practice working with Rust's match statement to map numbers to their respective weekdays.

Your task

Your task is to implement a function, weekday_from_number(day: u8) -> &'static str, that takes a number as input and returns the corresponding weekday as a string. If the input number is not within the range of 1 to 7, the function should return "Invalid day number".

Requirements

If the input number is 1, the function should return "Monday".
If the input number is 2, the function should return "Tuesday".
If the input number is 3, the function should return "Wednesday".
If the input number is 4, the function should return "Thursday".
If the input number is 5, the function should return "Friday".
If the input number is 6, the function should return "Saturday".
If the input number is 7, the function should return "Sunday".
If the input number is not between 1 and 7, the function should return "Invalid day number".

Example

let result = weekday_from_number(1);
assert_eq!(result, "Monday");
 
let result = weekday_from_number(5);
assert_eq!(result, "Friday");
 
let result = weekday_from_number(8);
assert_eq!(result, "Invalid day number");

Hints

Use the match statement to map each number to its corresponding weekday.
Remember that Rust strings are UTF-8 encoded and &'static str denotes a string slice that lives for the entire duration of the program

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Solutions

zelsazgh

an hour ago

2.01ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    let myweekday =match day{
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    myweekday
}

VladyslavY

4 hours ago

2.07ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1..=7 => ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"][day as usize - 1],
        _ => "Invalid day number",
    }
}

Tiago Silva

tiagombsilva

8 hours ago

2.16ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    let weekday = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    };
    weekday
}

Delta Regeer

digitalresistor

8 hours ago

2.09ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => return "Monday",
        2 => return "Tuesday",
        3 => return "Wednesday",
        4 => return "Thursday",
        5 => return "Friday",
        6 => return "Saturday",
        7 => return "Sunday",
        _ => "Invalid day number"
    }
}

José Bernardo

jose-bernardo

9 hours ago

2.09ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Maki-SIO

12 hours ago

2.10ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    let mut res: &str = "";
    match day {
        1 => res = "Monday",
        2 => res = "Tuesday",
        3 => res = "Wednesday",
        4 => res = "Thursday",
        5 => res = "Friday",
        6 => res = "Saturday",
        7 => res = "Sunday",
        _ => res = "Invalid day number"
    }
    res
}

Carlos Arias

carlos-quantexai

13 hours ago

2.28ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number", // Handle invalid input
    }
}

Logan Radloff

radloffl

13 hours ago

2.02ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    let s = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    return s;
}

mephit

just-mephit

14 hours ago

2.00ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

retinotopic

14 hours ago

2.08ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    let daystr: &'static str;
    match day {
        1 => daystr = "Monday",
        2 => daystr = "Tuesday",
        3 => daystr = "Wednesday",
        4 => daystr = "Thursday",
        5 => daystr = "Friday",
        6 => daystr = "Saturday",
        7 => daystr = "Sunday",
        _ => daystr = "Invalid day number",
    }
    return daystr;
}

Alex

dslex35

17 hours ago

2.18ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
    1 => return "Monday",
    2 => return "Tuesday",
    3 => return "Wednesday",
    4 => return "Thursday",
    5 => return "Friday",
    6 => return "Saturday",
    7 => return "Sunday",
    _ => return "Invalid day number",
}
}

viktr

victorchukwuemeka

a day ago

2.09ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

今何求

jhq223

a day ago

2.03ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    let resutl = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    resutl
}

Thatphum

ThatphumCpre

a day ago

2.07ms

86.92kb

use std::collections::HashMap;
pub fn weekday_from_number(day: u8) -> &'static str {
    let daymap = HashMap::from([
        (1, "Monday"),
        (2, "Tuesday"),
        (3, "Wednesday"),
        (4,"Thursday"),
        (5, "Friday"),
        (6, "Saturday"),
        (7, "Sunday"),
    ]);
    daymap.get(&day).unwrap_or(&"Invalid day number")
    
}

Francisco

francisco-cmyk

a day ago

2.14ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    let day_str = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    return day_str
}

Will Barnett

xbarnett

a day ago

2.01ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Mikhail

mk-comm

a day ago

2.00ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Johnchoi913

a day ago

2.00ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Johnchoi913

a day ago

1.95ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

lishigushi

2 days ago

2.00ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

majesticalcreature

2 days ago

2.10ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

sander-b-postnl

2 days ago

2.14ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1..=7 => ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"][day as usize - 1],
        _ => "Invalid day number",
    }
}

Matei Stefanescu

matei

2 days ago

1.95ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        default => "Invalid day number"
    }
}

Edoardo A. Morosanu

edoardo-morosanu

2 days ago

2.01ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

i5.650

i5-650

2 days ago

2.12ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

amassare

2 days ago

2.13ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    if day<1||day>7{
        return "Invalid day number";
    }
    let weekday=["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"];
    weekday[day as usize -1]
}

Zava

zavakid

2 days ago

2.09ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

IdoPort

2 days ago

2.04ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Ryumin

RiskyRomero

2 days ago

2.13ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Ustin

2 days ago

2.02ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Laurențiu STOLERIU

LaurentiuStoleriu

2 days ago

2.12ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day{
        1 => return "Monday",
        2 => return "Tuesday",
        3 => return "Wednesday",
        4 => return "Thursday",
        5 => return "Friday",
        6 => return "Saturday",
        7 => return "Sunday",
        _ => return "Invalid day number"
    }
}

至尊宝

shankun

2 days ago

2.08ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

Parallaxes

2 days ago

2.07ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

ogaca42

3 days ago

2.07ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

Jonathan Lopez

otherJL0

3 days ago

2.11ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

Ayush Rawat

ayushrawat10

3 days ago

2.17ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

Patrik Bjärterot

pbjarterot

3 days ago

2.14ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => return "Monday",
        2 => return "Tuesday",
        3 => return "Wednesday",
        4 => return "Thursday",
        5 => return "Friday",
        6 => return "Saturday",
        7 => return "Sunday",
        _ => return "Invalid day number"
    }
}

Stefano Cianciulli

CianciuStyles

3 days ago

2.09ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Smit Barve

l3vith

3 days ago

2.16ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Egor Konovalov

agegorin

3 days ago

2.09ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

daanbouwman19

3 days ago

2.11ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

damascussteel21

3 days ago

2.25ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Oleksandr Romanov

alexromanov

3 days ago

2.24ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    let weekday = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    weekday
}

Saint Luang

mynamesent

3 days ago

2.13ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Joel Vicente Filho

kyhou

3 days ago

2.11ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number"
    }
}

Ojash Neopane

oneopane

3 days ago

2.15ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    }
}

Jiawei Tian

AtJiawei

3 days ago

1.96ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
          match day {
            1=> "Monday",
            2=> "Tuesday",
            3=> "Wednesday",
            4=> "Thursday",           
            5=> "Friday",
            6=> "Saturday",
            7=> "Sunday", 
            _=> "Invalid day number",   
       }
}

Xinoi

3 days ago

1.97ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    let weekday = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    weekday
}

Adi

Aditeya

4 days ago

2.06ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    // TODO: Implement the function here
    let day = match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number",
    };
    day
}

Edgar Christian

edgarcnp

4 days ago

2.00ms

81.13kb

pub fn weekday_from_number(day: u8) -> &'static str {
    match day {
        1 => "Monday",
        2 => "Tuesday",
        3 => "Wednesday",
        4 => "Thursday",
        5 => "Friday",
        6 => "Saturday",
        7 => "Sunday",
        _ => "Invalid day number" 
    }
}