Design a function to finding factorial of given number in c

Design a Function to Find the Factorial of a Given Number in C

In C, factorial of a number is the product of all positive integers from 1 to the number itself. For example, the factorial of 5 (written as 5!) is 1 x 2 x 3 x 4 x 5 = 120.

To design a function to find the factorial of a given number, you can follow these steps:

1. Declare a function that takes an integer as an argument and returns an integer as a result.
2. Inside the function, declare a variable to hold the factorial and initialize it to 1.
3. Use a loop to iterate from 1 to the given number and multiply the factorial variable with the loop counter in each iteration.
4. After the loop is completed, return the factorial variable.

 C code that implements the above steps:

#include<stdio.h>
int factorial(int num) {
    int fact = 1;
    int i;

    for (i = 1; i <= num; i++) {
        fact *= i;
    }
return fact;
}
int main() {
    int num;
    printf("Enter a number: ");
    scanf("%d", &num);
    printf("Factorial of %d is %d.\n", num, factorial(num));
    return 0;
}

The output of the given C code is as follows:

Enter a number: 5
Factorial of 5 is 120.