Program to convert binary number system to decimal number system

How to convert binary to decimal:

To convert any binary number to decimal follow these steps:
1. Take the LSB(Least Significant Bit) and multiply it with 2⁰.

2. Now take next bit and multiply it with 2¹.
3. Now take next bit and multiply it with 2².
4. Follow this multiplication of next bit and increasing power of 2 until we reach MSB(Most Significant Bit).
5. Now add all the results of the steps above.

We will have the decimal equivalent.

Example:
Here I am converting binary number 1010 to its decimal equivalent.

(1010)₂=(?)₁₀

1.     0*2⁰=0
2.     1*2¹=2
3.     0*2²=0
4.     1*2³=8
5.     0+2+0+8=10
so binary equivalent of 1010 is 10.

(1010)₂=(10)₁₀

This program will calculate binary to decimal for you:
//Program to convert binary to decimal #include<stdio.h> #include<conio.h> #include<math.h> void main() { int l,n,i,t,decimal=0; clrscr(); printf("Enter limit : "); scanf("%d",&l); printf("Enter binary number \n"); printf("Enter number : "); scanf("%d",&n); i=0; while(i<l) { t=n%10; n=n/10; decimal+=t*pow(2,i); i++; } printf("decimal number is %d",decimal); getch(); }