fn sqrt(n: usize) -> usize {
  let mut ret = 1;
  loop {
    match (ret * ret).cmp(&n) {
      Ordering::Less => ret += 1,
      Ordering::Equal => return ret,
      Ordering::Greater => panic!("no exact square root for {}", n),
    }
  }
}
/// returns the exact square root of `n` if there is one.
returns the exact square root of `n` if there is one.
returns the exact square root of ` n ` if there is one .
fn sqrt(n: usize) -> usize {
  let mut ret = 1;
  loop {
    match (ret * ret).cmp(&n) {
      Ordering::Less => ret += 1,
      Ordering::Equal => return ret,
      Ordering::Greater => panic!("no exact square root for {}", n),
    }
  }
}
fn sqrt ( n : usize ) -> usize { let mut ret = 1 ; loop { match ( ret * ret ) . cmp ( & n ) { Ordering :: Less => ret += 1 , Ordering :: Equal => return ret , Ordering :: Greater => panic ! ( " " n ) , } } }
returns the exact square root of `n` if there is one.
returns the exact square root of ` n ` if there is one .
n
usize
n
usize