C Exercises: Convert a binary number into a decimal using math function
C For Loop: Exercise-46 with Solution
Write a C program to convert a binary number into a decimal number using the math function.
visual Presentation:

Sample Solution:
C Code:
#include <stdio.h> // Include the standard input/output header file.
#include <math.h> // Include the math functions header file.
void main()
{
int n1, n; // Declare variables to store input and results.
int dec = 0, i = 0, j, d; // Initialize variables for decimal conversion.
printf("\n\nConvert Binary to Decimal:\n "); // Print a message.
printf("-------------------------\n"); // Print a separator.
printf("Input the binary number:"); // Prompt the user for input.
scanf("%d", &n); // Read the binary number from the user.
n1 = n; // Store the original binary number for display.
// Loop to convert binary to decimal.
while (n != 0)
{
d = n % 10; // Get the rightmost digit of the binary number.
dec = dec + d * pow(2, i); // Convert and accumulate the decimal value.
n = n / 10; // Remove the rightmost digit from the binary number.
i++; // Increment the position counter.
}
// Print the result.
printf("\nThe Binary Number: %d\nThe equivalent Decimal Number is: %d\n\n", n1, dec);
}
Sample Output:
Convert Binary to Decimal: ------------------------- Input the binary number :1010100 The Binary Number : 1010100 The equivalent Decimal Number is : 84
Flowchart:

C Programming Code Editor:
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Next: Write a C program to check whether a number is a Strong Number or not.
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