Digital product

main.rs

/*
Digital product - counts how many steps takes to multiply digits of number and get to 1 digits. 

123: 
1*2*3 => 6

=> 1 Step(s)
*/

fn multiplie_digits(n: u32) -> u32
{
    let mut x: u32 = 1;
    for i in n.to_string().chars()
    {
        x *= i.to_digit(10).unwrap();
    }
    x
}

fn per(n: u32, csteps: u32) -> u32
{
    let mut steps = csteps;
    if n.to_string().len() == 1
    {
        return steps;
    }
    
    steps += 1;
    steps = per(multiplie_digits(n), steps);
    steps
}

fn main() 
{
    println!("{}",per(1386,0));
    
}