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, "user@example.com");
assert_eq!(result, Ok(()));
 
let result = validate_user(-1, "user@example.com");
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

John Galadima

Galadima3

12 hours ago

2.99ms

87.44kb

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(())
}

Piyush Mishra

PiyushMishra

a day ago

2.84ms

87.44kb

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(())
}

AQian

AQian0

3 days ago

3.11ms

87.44kb

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(())
}

Nanjakkun

nanjakkun

6 days ago

2.74ms

87.44kb

/*
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(()).
*/
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(())
}

Shinolr

6 days ago

4.85ms

87.44kb

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(())
}

Itisjustantheory

6 days ago

2.71ms

87.44kb

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(())
}

Erick Karanja

Erickkaranja

7 days ago

49.00ms

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(())
}

DrPing

DocteurPing

7 days ago

4.15ms

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(())
}

Yuan Xu

yuan1789

9 days ago

5.17ms

81.43kb

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

Zodiacsyndicate

ZodiacSyndicate

11 days ago

7.13ms

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(())
}

Ricardo Freire

seccone

12 days ago

8.89ms

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(())
}

Corny

CorndogMillionaire

14 days ago

6.36ms

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 !contains(&email,'@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}
fn contains(text:&str, c:char) -> bool {
    for x in text.chars() {
        if x == c {
            return true;
        } 
    }
    return false;
}

Edwin

ark930

15 days ago

4.77ms

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(())
    }
}

Jungseok Lee

jungseoklee

20 days ago

6.01ms

81.43kb

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

Wei Shen

shenwei356

22 days ago

4.38ms

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(())
}

Alex

ravsii

25 days ago

5.26ms

86.72kb

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

Mohamed Ahmed Beder

Beder-asu

a month ago

6.65ms

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(())
}

Livin Nector

livinNector

a month ago

3.94ms

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(())
}

Octarudin Mahendra

octarudin

a month ago

6.89ms

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(())
}

Ahmad Ashraf Galal

ahmadashrafgalal

a month ago

3.90ms

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(())
}

Karshik Madavi

c0d3c

a month ago

5.07ms

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(())
}

Karshik Madavi

c0d3c

a month ago

10.32ms

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(())
}

vraneb

a month ago

2.90ms

81.43kb

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

Yashwanth

Yash981

a month ago

2.80ms

86.72kb

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

Atanas Krondev

AtanasKrondev

a month ago

3.10ms

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(())
}

zibuyu28

a month ago

3.18ms

81.43kb

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

silaskoemen

a month ago

3.04ms

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(())
}

jcarey9149

a month ago

2.96ms

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(())
}

delxs

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(())
}

Marouan Boulahtouf

MBoulahtouf

2 months ago

2.99ms

81.43kb

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

Sandeep chauhan

ryzen-xp

2 months ago

3.24ms

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(())
}

Ishaan-2312

2 months ago

3.12ms

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());}
    return Ok(());
}

Vendra000

2 months ago

3.06ms

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(());
}

azmahflameheart

2 months ago

2.91ms

86.72kb

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

Omar Saber Talaat Abdelrahman

omar-s-ta

2 months ago

4.02ms

86.72kb

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

vivek

vivek-inavalli

2 months ago

2.87ms

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(())
}

vivek

vivek-inavalli

2 months ago

3.24ms

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(())
}

vqk-2003

2 months ago

3.19ms

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(())
}

地沟油嘎嘎香

labike

2 months ago

3.60ms

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.contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Ramon Silva

rsilva1

2 months 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

2 months 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

2 months 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

2 months 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

2 months 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

2 months 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

2 months 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

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());
    }
    return Ok(());
}

<YoungAncient/>

youngancient

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_string());
    }
    if !email.contains('@'){
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Kishan

wdcs-kishansudani

2 months 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

2 months 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(());
    }
}