Question

How to write a recursive function that calculates power in Rust

Answer 1

fn main() {
    println!("{}", power(2, 3)); // 8
    println!("{}", power(2, 4)); // 16
    println!("{}", power(3, 2)); // 9
    println!("{}", power(3, 3)); // 27
    println!("{}", power(5, 4)); // 625
    println!("{}", power(0, 7)); // 0
}

fn power(x: i32, y: i32) -> i32 {
    if y == 0 {
        return 1;
    }
    
    x * power(x, y - 1)
}


  
/*
run:

8
16
9
27
625
0

*/

 

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