fun factorial(n) {
    // Computes the factorial of n iteratively

    if (n < 0) return nil;
    if (n == 1 or n == 2) return n;
    var fact = 1;
    for (var i = 1; i < n + 1; i = i + 1) {
        fact = fact * i;
    }
    return fact;
}


var start = clock();
print("Computing factorials from 0 to 200");
for (var i = 0; i < 201; i = i + 1) factorial(i);
var result = clock() - start;
print("Computed factorials in " + stringify(result) + " seconds");