Rust Tutorials

How to Check if String contains only Numeric Digits in Rust

How to Check if String contains only Numeric Digits in Rust ?

Answer

To check if a string contains only numeric digits in Rust, you can iterate through each character in the string and check if it is a digit using 'char::is_numeric' method.

✐ Examples

1 Check if String contains only Numeric Digits using character iteration

In this example,

We create a function 'contains_only_numeric_digits' that takes a string slice as input.
We iterate through each character in the string using 'chars' method.
We check if each character is a numeric digit using 'char::is_numeric' method.
If all characters are numeric digits, 'true' is returned; otherwise, 'false'.
Finally, we print the result.

Rust Program

fn contains_only_numeric_digits(s: &str) -> bool {
    for c in s.chars() {
        if !c.is_numeric() {
            return false;
        }
    }
    true
}

fn main() {
    let str = "12345";
    let all_digits = contains_only_numeric_digits(str);
    println!("String contains only numeric digits: {}", all_digits);
}

Output

String contains only numeric digits: true

Summary

In this tutorial, we learned How to Check if String contains only Numeric Digits in Rust language with well detailed examples.

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