Q. Write an algorithm and program to convert decimal number to binary number.

Solution : Given a number and our task is to convert given decimal number into equivalent binary number.

Binary Number :- A binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically "0" (zero) and "1" (one).
Decimal Number :- A decimal number can be defined as a whole number.

Example :-
Input : 10
Output : 1010

Algorithm For Decimal to Binary Conversion

//Algorithm for Decimal to Binary Conversion.
START
Step 1 ->  Take numbere as input num.
Step 2 ->  while num is greater than 0:
bin[count]=num%2;
num=num/2;
count++;
Step 3 ->  Print bin[] array.                
STOP


Program for Decimal to Binary Conversion

  • C
  • C++
  • Java
  • Python
  • C#
  • PHP
    • //C Program for Decimal to Binary Conversion.
#include <stdio.h>
int main()
{
int num=5,count=0,i;
int bin[32];
while(num>0)
{
bin[count]=num%2;
num=num/2;
count++;
}
printf("Binary value is: ");
for(i=(count-1); i>=0;i--)
printf("%d",bin[i]);
return 0;
}

    //C++ Program for Decimal to Binary Conversion.
#include <iostream>
using namespace std; 
int main() 
{ 
int num=5,count=0,i;
int bin[32];
while(num>0)
{
bin[count]=num%2;
num=num/2;
count++;
}
cout<<"Binary value is: ";
for(i=(count-1); i>=0;i--)
cout<<bin[i];
return 0; 
}

    //Java Program for Decimal to Binary Conversion.
public class LFC
{
public static void main(String[] args) {
int num=5,count=0,i;
int[] bin = new int[32]; 
while(num>0)
{
bin[count]=num%2;
num=num/2;
count++;
}
System.out.print("Binary value is: ");
for(i=(count-1); i>=0;i--)
System.out.print(bin[i]);
}
}

    //Python Program for Decimal to Binary Conversion.
num = 5;
bin = [0] * num;
count = 0; 
while (num > 0):  
bin[count] = num % 2; 
num = int(num / 2); 
count += 1; 
print("Binary value is: ")    
for i in range(count - 1, -1, -1): 
print(bin[i], end = "");   

    //C# Program for Decimal to Binary Conversion.
using System;
class LFC {
static void Main() {
int num = 5;
int[] bin = new int[32]; 
int count = 0; 
while (num > 0) { 
bin[count] = num % 2; 
num = num / 2; 
count++; 
} 
Console.Write("Binary value is: ");
for (int i = count - 1; i >= 0; i--) 
Console.Write(bin[i]);
}
}

    //PHP Program for Decimal to Binary Conversion.
<?php
$num=5;
$bin; 
$count = 0; 
while ($num > 0)  
{ 
$bin[$count] = $num % 2; 
$num = (int)($num / 2); 
$count++; 
} 
echo "Binary value is: ";
for ($i = $count - 1; $i >= 0; $i--) 
echo $bin[$i]; 
?>
    //C Program for Decimal to Binary Conversion.
#include <stdio.h>
int main()
{
int num=5,count=0,i;
int bin[32];
while(num>0)
{
bin[count]=num%2;
num=num/2;
count++;
}
printf("Binary value is: ");
for(i=(count-1); i>=0;i--)
printf("%d",bin[i]);
return 0;
}

    Output

    Binary value is: 101

    Recommended Programs

       Program to print lower triangular elements of an array.
       Program to print full pyramid pattern using stars.