## C Program to Convert Binary Number to Decimal Number

June 5, 2021 This program converts binary number to equivalent decimal number.

## Example: Program to convert binary to decimal

In this program, we have created a user defined function `binaryToDecimal()` for binary to decimal conversion. This programs takes the binary number (entered by user) as input and converts it into a decimal number using function. To understand this program, you should be familiar with the following C programming concepts:

```#include <stdio.h>
#include <math.h>
int binaryToDecimal(long binarynum)
{
int decimalnum = 0, temp = 0, remainder;
while (binarynum!=0)
{
remainder = binarynum % 10;
binarynum = binarynum / 10;
decimalnum = decimalnum + remainder*pow(2,temp);
temp++;
}
return decimalnum;
}

int main()
{
long binarynum;
printf("Enter a binary number: ");
scanf("%ld", &binarynum);

printf("Equivalent decimal number is: %d", binaryToDecimal(binarynum));
return 0;
}```

Output:

```Enter a binary number: 1010111
Equivalent decimal number is: 87```