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Digital product
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/* | |
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)); | |
} |
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