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C Program to check whether a Number is Binary or Not

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In this tutorial, we will write a program to check for the binary number in C.

What is a Binary Number?

A binary number is a number expressed in the base-2 numeral system that is the number that contains 2 symbols to represent all the numbers. The symbols are 0 and 1.

For example: 101011, 110011110, 10001111 are binary numbers.

C Program to check whether a Number is Binary or Not

We have used the while loop to iterate through the entered number in the program below. The program takes the input of a number from the user.

With each iteration, there is an if condition to check for 1 and 0 in the digit, If it is not 1 or 0 then it is not a binary number.

#include <stdio.h>
#include <conio.h>

int main()
{
  int i, number;

  printf("Enter the Number: ");
  scanf("%d", &number);

  int temp = number;

  while (number > 0)
  {
    i = number % 10;

    if (i != 0 && i != 1)
    {
      printf("%d is not a binary number", temp);
      break;
    }

    number /= 10;

    if (number == 0)
    {
      printf("%d is a binary number", temp);
    }
  }

  getch();
  return 0;
}

Output:

Enter the Number: 1101
1101 is a binary number

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