Validate User Input

In many programs, validating user input is a common and crucial task. Ensuring that input data adheres to expected formats and constraints can prevent bugs, enhance security, and improve user experience. In this challenge, you will create a function that validates a user's age and email, returning early if any conditions are not met.

Your task

Your task is to implement a function validate_user(age: i32, email: &str) -> Result<(), String> that validates the user's age and email. The function should follow these rules:

If the age is less than 0 or greater than 120, return an error with the message "Invalid age".
If the email does not contain an '@' symbol, return an error with the message "Invalid email".
If both the age and email are valid, return Ok(()).

Here's an example of how to use the early return technique:

fn early_return(name: &str, age: i32) -> Result<(), String> {
    if name.is_empty() {
        return Err("Name is empty".to_string());
    }
 
    if age < 0 {
        return Err("Invalid age".to_string());
    }
 
    Ok(())
}

Example

let result = validate_user(25, "[email protected]");
assert_eq!(result, Ok(()));
 
let result = validate_user(-1, "[email protected]");
assert_eq!(result, Err("Invalid age".to_string()));
 
let result = validate_user(25, "userexample.com");
assert_eq!(result, Err("Invalid email".to_string()));

Hints

Use the return keyword to exit the function early when an invalid condition is encountered.
Consider using the contains method to check if the email contains an '@' symbol.

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Solutions

Ramon Silva

rsilva1

an hour ago

3.24ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || 120 < age {
        return Err(String::from("Invalid age"));
    }
    if !email.contains("@") {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

emiludenz

10 hours ago

3.11ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age >= 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

SpontaneousOverthrow

5 days ago

3.34ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement her
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string())
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Asrul Firdaus

AsrulF

7 days ago

2.89ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    } 
    Ok(())
}

makinpaper

8 days ago

3.61ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if email.is_empty() || !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Anton

majesty-dump

9 days ago

3.00ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120{
        return Err("Invalid age".to_string());
    }
    if  !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    return Ok(());
    }

miel-codeai

10 days ago

2.90ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age <= 0 || age >= 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Anton

majesty-dump

12 days ago

2.95ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    return Ok(());
}

<YoungAncient/>

youngancient

15 days ago

3.06ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age <0 || age > 120{
        return Err("Invalid age".to_string());
    }
    if !email.contains('@'){
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Kishan

wdcs-kishansudani

15 days ago

5.21ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    match (age, email) {
        (age, _) if age < 0 || age > 120 => Err("Invalid age".to_owned()),
        (_, email) if !email.contains("@") => Err("Invalid email".to_owned()),
        _ => Ok(()),
    }
}

Retroz

Fungichi

16 days ago

3.31ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age > 120 || age < 0{
        return Err("Invalid age".to_string());
    }else if !email.contains("@"){
        return Err("Invalid email".to_string());
    }else{
        return Ok(());
    }
}

Chawin Chaisongkram

chawinkn

18 days ago

3.42ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

noname

random1106

21 days ago

3.04ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    } else if !email.contains('@') {
        return Err("Invalid email".to_string());
    } else {
        return Ok(());
    }
}

Tim

timvyy

24 days ago

4.58ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    } else if !email.contains("@") {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

jh4vision

a month ago

3.34ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age <0 || age >120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@"){
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Vincent SAMY

vsamy

a month ago

3.68ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age >120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Rubén Moreno aguado

rmaguado

a month ago

4.52ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    return Ok(());
}

SubZ69

a month ago

4.52ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    } else if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Prakash Mardi

Mardiprk

2 months ago

3.69ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0  || age > 120 {
        return Err("Invalid age".to_string());
    }else {
        if !email.contains("@"){
            return Err("Invalid email".to_string());
        }
    }
    Ok(())
}

Splatrac

splatrac

2 months ago

3.01ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Dominic Chua

DeusSeos

2 months ago

2.91ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string())
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

msned

2 months ago

3.23ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120{
        return Err(String::from("Invalid age"));
    } else if !email.contains("@"){
        return Err(String::from("Invalid email"));
    } else{
        return Ok(());
    }
}

Omar

OmniKobra

2 months ago

3.18ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 || !email.contains("@"){
        if age < 0 || age > 120 {
        return Err("Invalid age".into());
        } else {
        return Err("Invalid email".into());
        }
    }
Ok(())
}

TheJanzap

2 months ago

3.06ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_owned())
    }
    if !email.contains("@") {
        return Err("Invalid email".to_owned())
    }
    Ok(())
}

TheJanzap

2 months ago

2.95ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    match age {
        0..=120 => (),
        _ => return Err("Invalid age".into())
    }
    if !email.contains("@") {
        return Err("Invalid email".into())
    }
    Ok(())
}

ghoti225

2 months ago

3.50ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    let mut found_sym = false;
    for s in email.chars() {
        if s == '@'  {
            found_sym = true;
            break;
        }
    }
    if !found_sym {
        return Err("Invalid email".to_string());
    }
    return Ok(());
}

Miguel Ángel Allende

maallende

2 months ago

3.23ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age<0 || age>120{
        return  Err("Invalid age".to_string());
    }
    if !email.contains("@"){
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Tre1z

2 months ago

3.18ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string())
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Lvfalue

2 months ago

3.02ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

hemulya

2 months ago

3.07ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Arpan Shingala

arpan-vs

2 months ago

3.01ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    match (age, email.contains('@')) {
        (0..=120, true) => Ok(()),
        (n, _) if n < 0 || n > 120 => Err("Invalid age".to_string()),
        (_, false) => Err("Invalid email".to_string()),
        (_, _) => panic!()
    }
}

GunGraveCpp

2 months ago

3.33ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    match (age, email.contains('@')) {
        (0..=120, true) => Ok(()),
        // ( ..0 | 121.. , _) => Err("Invalid age".to_string()),
        (n, _ ) if n < 0 || n > 120 => Err("Invalid age".to_string()),
        (_ , false) => Err("Invalid email".to_string()),
        (_, _) => panic!()
    } 
}

amdfxlucas

2 months ago

2.95ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
   if age <0 || age > 120 
   {
    return Err("Invalid age".to_string());
   }
   if !email.contains("@")
   {
    return Err("Invalid email".to_string())
   }
   Ok(())
}

manu3618

3 months ago

3.15ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".into());
    }
    if !email.contains('@') {
        return Err("Invalid email".into());
    }
    Ok(())
}

aghia98

3 months ago

4.72ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age<0 || age > 120 {
        Err("Invalid age".to_string())
    }else{
        if !email.contains("@") {
            Err("Invalid email".to_string())
        }else {
            Ok((()))
        }
    }
}

Heino Mortensen

hmortensen83

3 months ago

3.12ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".into());
    }
    if !email.contains('@') {
        return Err("Invalid email".into());
    }
    Ok(())
}

bzdula

3 months ago

3.33ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    match (age, email) {
        _ if age < 0 || age > 120 => Err(String::from("Invalid age")), 
        _ if !email.contains("@") => Err(String::from("Invalid email")),
        _ => Ok(())
    }
}

Christophe Pronier

chrpron

3 months ago

3.27ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string())
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Walter White

durgaprasad118

3 months ago

3.79ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age<0 || age>120{
        return Err("Invalid age".to_string());
    }
    if !email.contains('@'.to_string().as_str()) {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Ranjith Thangavel

RanjithECE24

3 months ago

2.93ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }
    if !email.contains('@') {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

Wouter

WouterMartens

3 months ago

3.77ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

AP

Deaddy3

3 months ago

3.20ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !(email.to_string().contains("@")) {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

whhc

3 months ago

3.21ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Andy Randrianirina

andyslash

3 months ago

5.53ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age<0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@"){
        return Err("Invalid email".to_string())
    }
    Ok(())
}

David Manca

medzernik

3 months ago

2.96ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    match (age, email) {
        (age, _) if age < 0 || age > 120 => Err("Invalid age".to_string()),
        (_, email) if !email.contains('@') => Err("Invalid email".to_string()),
        _ => Ok(())
    }
}

Baron Curtin

baroncurtin2

3 months ago

3.71ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".into());
    }
    if !email.contains("@") {
        return Err("Invalid email".into());
    }
    Ok(())
}

Baron Curtin

baroncurtin2

3 months ago

3.06ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".into())
    }
    if !email.contains("@") {
        return Err("Invalid email".into())
    }
    Ok(())
}

Evrins Hu

evrins

3 months ago

3.10ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }
    if !email.contains('@') {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

johndoe30bc

4 months ago

4.28ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

xxxxsk

4 months ago

2.90ms

81.43kb


pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}