# C Program to convert Binary Number to Decimal

Published on January 25, 2017 by Senthil Kumar

Filed under C

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# Problem

Write a program in C to convert a binary number to decimal number.

# How to convert a binary number to decimal number in C ?

```#include <stdio.h>
#include <math.h>
int BinaryToDecimal(long input);

int main()
{
long input;
printf("Abundantcode.com Coding samples\n");
printf("Enter a binary number: ");
scanf("%ld", &input);
printf("%d in decimal", BinaryToDecimal(input));
return 0;
}

int BinaryToDecimal(long input)
{
int decimalNumber = 0, i = 0, remainder;
while (input!=0)
{
remainder = input%10;
input /= 10;
decimalNumber += remainder*pow(2,i);
++i;
}
return decimalNumber;
}```

# Output

Abundantcode.com Coding samples
Enter a binary number: 1101
13 in decimal

﻿
x

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