### Convert Decimal to Binary in C

In this source code example, we will write a code to convert the decimal number to a binary number in the C programming language.

# Convert Decimal to Binary in C

In this C program, we will take input from the User or console and print the result to the output:
``````#include <stdio.h>
#include <stdlib.h>

#define MAXBITS 100

int main()
{
// input of the user
int inputNumber;

// for the remainder
int re;

// contains the bits 0/1
int bits[MAXBITS];

// for the loops
int j;
int i = 0;

// reads a decimal number from the user.
printf("Enter a positive integer number: ");
scanf("%d", &inputNumber);

// make sure the input number is a positive integer.
if (inputNumber < 0)
{
printf("only positive integers >= 0\n");
return 1;
}

// actual processing
while (inputNumber > 0)
{
// computes the remainder by modulo 2
re = inputNumber % 2;

// computes the quotient of division by 2
inputNumber = inputNumber / 2;

bits[i] = re;
i++;
}

printf("The number in binary is: ");

// iterates backwards over all bits
for (j = i - 1; j >= 0; j--)
{
printf("%d", bits[j]);
}

// for the case the input number is 0
if (i == 0)
{
printf("0");
}

return 0;
}

``````

Output:

``````Enter a positive integer number: 50
The number in binary is: 110010``````