// There are three types of loops in rust.
// 1. The `loop` loop
// Using `loop`, you can loop until you choose to break out of it.
// The following loops forever:
loop {}
// 2. The `while` loop
// Using `while`, you can loop while a condition is met.
// The following loops until x is less than 0:
while x >= 0 {}
// 3. The `for` loop
// Using `for`, you can loop over an iterator.
// Most collections (like [T] or Vec<T>) can be used with this type of loop.
// The following loops over every element in a vector:
for element in vector {}