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Please give me C code to calculate the factorial of a given number using C programming language.

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Here is the C code that you can use to calculate the factorial of any given integer. The integer should be >=0. If you provide a negative integer, the code will return error.

#include <stdio.h>

int main() {

    int num;

    int factorial = 1;

    printf("Enter a number to compute its factorial: ");

    scanf("%d", &num);

    if (num > 0){

        for (int i = 1; i <= num; ++i) {

            factorial *= i;

        }

    }

    else if (num < 0){

        printf("Please enter a number >=0\n");

        return -1;

    }

    printf("Factorial of %d = %d\n", num, factorial);

    return 0;

}

Here is one output of the code:
Enter a number to compute its factorial: 10
Factorial of 10 = 3628800

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