fn for_in_loop() {
	for item in arr {
		println(item)
	}
}

fn for_in_loop_with_counter() {
	for i, item in arr {
		println(i)
		println(item)
	}
}

fn for_in_loop_with_index_expr() {
	for i in 0..10 {
		println(i)
	}
}
