Function factorial

Basic Programming/All_Patterns.c:54–60

}

int factorial(int n) {
    if (n == 0 || n == 1) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
}

int binomialCoefficient(int n, int r) {
    return factorial(n) / (factorial(r) * factorial(n - r));