A second way of writing loops is using while
: give it a condition to check, and its loop code will go around and around until the condition fails.
For example, we could use a while
loop to simulate a child counting in a game of hide and seek: we start at one, count up to and including 20 while printing each number out, then after the loop print “Ready or not”.
Here’s how that looks in Swift:
var number = 1
while number <= 20 {
print(number)
number += 1
}
print("Ready or not, here I come!")
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