factorialize.rs

#[no_mangle]
    pub extern fn factorialize(mut num: i64) -> i64 {
    	if num == 0 || num == 1 {
    	  return 1;
    	}
       let mut cnt = num - 1;
       loop {
         if cnt < 1 {
           break;
       	 }
       	 num = num * cnt;
       	 cnt = cnt -1;
      }
        return num;
   }