ShreeSanaviAcademy.

#include<stdio.h>
#include<conio.h>
long int fact1(int n);
int main() {
    int n;
    printf("Enter a positive integer: ");
    scanf("%d",&n);
    printf("Factorial of %d = %ld", n, fact1(n));
    getch();
    return 0;
}

long int fact1(int n) {
    if (n>=1)
        return n*fact1(n-1);
    else
        return 1;
}

Enter a positive integer: 8
Factorial of 8 = 40320
--------------------------------
Process exited after 7.488 seconds with return value 0
Press any key to continue . . .