function toHex(num){
 if(num===0) return "0";
 num >>>= 0;
 const hex="0123456789abcdef";
 let out="";
 while(num){
  out = hex[num & 15] + out;
  num >>>= 4;
 }
 return out;
}

function toHex(num:number):string{
 if(num===0) return "0";
 num = num >>> 0;
 const hex="0123456789abcdef";
 let out="";
 while(num){
  out = hex[num & 15] + out;
  num = num >>> 4;
 }
 return out;
}

package main

func toHex(num int32) string {
	if num == 0 {
		return "0"
	}
	hex := "0123456789abcdef"
	n := uint32(num)
	out := make([]byte, 0, 8)

	for n != 0 {
		out = append(out, hex[n&0xF])
		n >>= 4
	}

	for i, j := 0, len(out)-1; i < j; i, j = i+1, j-1 {
		out[i], out[j] = out[j], out[i]
	}
	return string(out)
}

func main() {}

fn to_hex(num: i32) -> String {
	if num == 0 { return "0".to_string(); }
	let hex = b"0123456789abcdef";
	let mut n = num as u32;
	let mut out: Vec<u8> = vec![];
	while n != 0 {
		out.push(hex[(n & 0xF) as usize]);
		n >>= 4;
	}
	out.reverse();
	String::from_utf8(out).unwrap()
}

fn main() {}