Question

.Write a program to find the factorial of a number. ​

Answer 1

#include <stdio.h>

int main() {

int n, i;

unsigned long long fact = 1;

printf("Enter an integer: ");

scanf("%d", &n);

// shows error if the user enters a negative integer

if (n < 0)

printf("Error! Factorial of a negative number doesn't exist.");

else {

for (i = 1; i <= n; ++i) {

fact *= i;

}

printf("Factorial of %d = %llu", n, fact);

}

return 0;

}

Output

Enter an integer: 10

Factorial of 10 = 3628800

Answer 2

Answer:

C program to find factorial of a number

long factorial(int);

int main() { int n;

printf("Enter a number to calculate its factorial\n"); scanf("%d", &n);

printf("%d! = %ld\n", n, factorial(n));

return 0; }

long factorial(int n) { int c; long r = 1;

for (c = 1; c <= n; c++) r = r * c;

return r; }

Explanation:

That's all......