while

The while keyword can be used to run a loop while a condition is true.

Let's write the infamous FizzBuzz problem using a while loop.

/mob/Login()
    // A counter variable
    var/n = 1

    // Loop while `n` is less than 101
    while (n < 101)
        if (n % 15 == 0)
            world << "fizzbuzz"
        else if (n % 3 == 0)
            world << "fizz"
        else if (n % 5 == 0)
            world << "buzz"
        else
            world << "[n]"

        // Increment counter
        n += 1