Description

Convert decimal to binary means convert it in 0,1 format follow below program.

C/C++

/* C Program to convert Decimal to Binary */
//Save it as ConvertDecimalToBinary.c

#include<stdio.h>
int main(){

    int dec, rem, bin=0, count=1;

    printf("Enter a decimal value : ");
    scanf("%d", &dec);

    //Storing the decimal value to temporary variable
    int temp = dec;

    while(dec > 0) {

        //Calculation of remainder
        rem = dec % 2;

        //Calculation of octal value
        bin += (rem * count);

        //storing exponential value
        count *= 10;

        dec /= 2;
    }

    //Restoring the decimal value
    dec = temp;

    printf("Binary value of %d is %d", dec, bin);

    return 0;
}

Input:
Enter a decimal value : 9

Output:
Binary value of 9 is 1001

Java

/* Java Program to convert Decimal to Binary */
//Save it as ConvertDecimalToBinary.java

import java.io.*;
import java.util.Scanner;

public class ConvertDecimalToBinary {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        
        System.out.println("Enter a decimal value : ");
        int dec = scanner.nextInt();
        
        //Storing the decimal value to temporary variable
        int temp = dec;
        
        int rem, bin=0, count=1;
        
        while(dec > 0) {
            
            //Calculation of remainder
            rem = dec % 2;
            
            //Calculation of octal value
            bin += (rem * count);
            
            //storing exponential value
            count *= 10;
            
            dec /= 2;
        }
        
        //Restoring the decimal value
        dec = temp;
        
        System.out.println("Binary value of "+ dec +" is "+ bin);
        
        
        /* 
            There is predefined function in Java to convert decimal to binary
            Integer.toBinaryString(decimalNumber)
        */
        
    }
}

Input:
Enter a decimal value : 
9

Output:
Binary value of 9 is 1001

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