C Program To Convert Decimal To Binary Using For Loop

In this tutorial, we are going to see how to write a C program to convert decimal to binary using for loop. With a decimal number as input, we need to write a program to convert the given decimal number into the equivalent binary number.

The decimal number is a 10 base number because it goes from 0 to 9, there are 10 digits in total, between 0 and 9. Any combination of digits represents a decimal number such as 23, 445, 132, 0, 2, etc.

The binary number is a 2 base number, because 0 or 1. Any combination of 0 and 1 represents a binary number such as 1001, 101, 11111, 101010, etc.
 

 

C Program To Convert Decimal To Binary Using For Loop

#include <stdio.h>  
#include <stdlib.h> 

int main(){
  
  int arr[10], nbr, i;  
  
  printf("Enter the number to convert: ");  
  scanf("%d",&nbr);  
  
  for(i=0; nbr > 0; i++)  
  {  
    arr[i] = nbr%2;  
    nbr = nbr/2;  
  } 
  
  printf("\nThe binary number is = ");
  
  for(i=i-1; i >= 0; i--)  
  {  
    printf("%d",arr[i]);  
  }  
  
  return 0;
}

Output:

Enter the number to convert: 10

The binary number is = 1010

 

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