C Program to convert binary to decimal number

 In this example, we will learn how to convert the binary to decimal number in the c programming language. Following is the solution to the problem.

code:

#include <math.h>

#include <stdio.h>

int main() {

    long long num,original;

    printf("Enter a binary number: ");

    scanf("%lld", &num);

    original=num;

    

    int deci = 0, i = 0, remainder;

    while (num != 0) {

        remainder = num % 10;

        num /= 10;

        deci += remainder * pow(2, i);

        ++i;

    }

    printf("%lld in binary = %d in decimal", original, deci);

    return 0;

}

Output:

Enter a binary number: 111

111 in binary = 7 in decimal

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