Factorial a Number Using Pointers in C

 A program that will ask the user to give a number and then the program will compute the factorial value of the given number using pointers in C programming language.

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Program Listing

#include <stdio.h>

void factorial(int num, int *result_ptr) {
    int fact = 1;

    // Calculate the factorial
    for (int i = 1; i <= num; i++) {
        fact *= i;
    }

    // Store the result at the memory address pointed by result_ptr
    *result_ptr = fact;
}

int main() {
    int number, result;

    printf("\n\n\tFactorial a Number Using Pointers in C\n\n");
    printf("\tEnter a number: ");
    scanf("%d", &number);

    factorial(number, &result);

    printf("\n\n");
    printf("\tFactorial of %d is: %d\n", number, result);

    return 0;
}