LUT-yliopisto/B.Sc. (Tech.) in Software and Systems Engineering/LES10A110 Principles of C-programming/Lectures/Lecture 4/Example9.c

#include<stdio.h>

int fact(int n);

int main() {
    int n;
    printf("Enter a positive integer: ");
    scanf("%d",&n);
    printf("%d ! = %d \n", n, fact(n));
    return 0;
}

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