Decimal to Binary

const n = 13;
console.log(n.toString(2));

public class Main {
    public static void main(String[] args) {
        int n = 13;
        System.out.println(Integer.toBinaryString(n));
    }
}

fun main() {
    val n = 13
    println(Integer.toBinaryString(n))
}

let n = 13
print(String(n, radix: 2))

void main() {
  int n = 13;
  print(n.toRadixString(2));
}

#include <iostream>
#include <string>
using namespace std;

int main() {
    int n = 13;
    string binary = "";
    while (n > 0) {
        binary = char('0' + n % 2) + binary;
        n /= 2;
    }
    if (binary == "") binary = "0";
    cout << binary << endl;
    return 0;
}

#include <stdio.h>

int main() {
    int n = 13;
    char binary[33];
    int i = 0;
    if (n == 0) binary[i++] = '0';
    while (n > 0) {
        binary[i++] = '0' + n % 2;
        n /= 2;
    }
    for (int j = i - 1; j >= 0; j--) putchar(binary[j]);
    putchar('\n');
    return 0;
}