exponentiation_recursive.rs

fn main() {
    println! {"3^3 = {:?}", exponentiation_recursive(3,3)}
    println! {"3^4 = {:?}", exponentiation_recursive(3,4)}
    println! {"2^3 = {:?}", exponentiation_recursive(2,3)}
    println! {"5^2 = {:?}", exponentiation_recursive(5,2)}
}

fn exponentiation_recursive(base: i32, exponent: i32) -> i32 {
    if exponent <= 1 {
        return base;
    }
    base * exponentiation_recursive(base, exponent - 1)
}