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Convert decimal value into binary value

For 4 binary is 100

For 21 binary is 10101 

Java

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 import java.util.Scanner;
 public class DecToBin{
     public static void main(String []args){
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter a decimal value:");
        int decimal = sc.nextInt();
        int binary = 0, i = 1;
        while(decimal!=0){
            binary += (decimal % 2) * i;
            i = i * 10;
            decimal = decimal / 2;
        }
        System.out.println("Binary value:"+binary);
     }
 }

Python

decimal = int(input("Enter a decimal value:"))
binary, i = 0, 1
while decimal!=0:
    binary += (decimal % 2) * i
    i = i * 10
    decimal = decimal // 2
print("binary value :",binary)


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