How to Convert String to Integer in Rust - Step by Step Examples

How to Convert String to Integer in Rust ?

To convert a String to an Integer in Rust, you can use the parse() method.

In this example,

We create a string variable named str with a string value of "321".
We then use the parse() method to convert it to an integer and store the result in the variable number.
The parse() method parses the string and returns the equivalent integer value.
Finally, we print the value of number using println!.

fn main() {
    let str = "321";
    let number: i32 = str.parse().expect("Failed to parse integer");
    println!("Integer value: {}", number);
}

Integer value: 321

In this example,

We create a string variable named str with a string value of "654".
We then use the parse() method to convert it to an integer and store the result in the variable number.
The parse() method parses the string and returns the equivalent integer value.
Finally, we print the value of number using println!.

fn main() {
    let str = "654";
    let number: i32 = str.parse().expect("Failed to parse integer");
    println!("Integer value: {}", number);
}

Integer value: 654

In this tutorial, we learned How to Convert String to Integer in Rust language with well detailed examples.