rustHow do I return a variable from a function in Rust?

You can return a variable from a function in Rust by using the return keyword.

Example code

fn main() {
    let x = 5;
    let y = add_one(x);
    println!("{} + 1 = {}", x, y);
}

fn add_one(x: i32) -> i32 {
    return x + 1;
}

Output example

5 + 1 = 6

Code explanation

1. let x = 5; - This line declares a variable x with the value of 5.
2. let y = add_one(x); - This line calls the add_one function with the argument x and assigns the return value to the variable y.
3. fn add_one(x: i32) -> i32 { - This line declares a function add_one which takes an argument x of type i32 and returns a value of type i32.
4. return x + 1; - This line returns the value of x + 1 from the add_one function.

Helpful links

• Rust Documentation - Functions

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