Here is given **c program** for **binary to decimal conversion**. But before let us see what is a Binary number is? A binary number is a number formed using only two digits i.e 1 or 0. A Decimal number is a number with base 10 which is in used very efficiently for manually calculations.Let us understand the conversion process through example.Suppose we have a binary number 1101 which is needed to be converted to decimal than its equivalent decimal number can be calculated as:

Multiplying 2^{} with last digit of binary number + Multiplying 2^{1} with second last digit of binary number

and so on upto the number is…i.e

1101 is equivalent to = 2^{} * 1 + 2^{1} * 0 + 2^{2} * 1 + 2^{3} * 1 = 13.

Hence 13 is decimal equivalent of binary number 1101.

**ALSO CHECK: java program for binary to decimal conversion.**

## Program for binary to decimal conversion in c

#include<stdio.h> #include<conio.h> void main() { int j=1,num,n,d,rem,dec=0; clrscr(); // clearing the screen printf("Enter the number in binary\n"); scanf("%d",&num); // Taking input binary number n=num; // assingning the num value to n while(n>0) { rem=n%10; // Taking the last digit of binary number d=rem*j; // j is a variable initialized to 1 which is 2^0 dec=dec+d; // dec is a variable used to store the decimal number after the calculation j=j*2; n=n/10; // skipping the last digit and again repeating the loop for next iteration. } printf("The Decimal Number is\n"); printf("%d",dec); // output the decimal number. getch(); // getting the char from keyboard to halt the program }

**OUTPUT:**

**Incoming terms:** C program to convert binary number to decimal number.