var arr = [10, 20, 30];
print("For loop:");
for (var i = 0; i < 3; i = i + 1) {
    print(arr[i]);
}

print("For-in loop:");
for (var item in arr) {
    print(item);
}

var strArr = ["Hello", "World"];
print("Foreach loop:");
foreach (s in strArr) {
    print(s);
}