Cycle

Scope

let zeroToThree = 0...3
//zeroToThree: 0, 1, 2, 3

Stride() Function

for oddNum in stride(from: 1, to: 5, by: 2) {
  print(oddNum)
}
// print: 1
// print: 3

For-in Loop

for char in "hehe" {
  print(char)
}
// print: h
// print: e
// print: h
// print: e

Continue keyword

for num in 0...5 {
  if num % 2 == 0 {
    continue
  }
  print(num)
}
// print: 1
// print: 3
// print: 5

The continue keyword will force the loop to continue for the next iteration

Break Keyword

for char in "supercalifragilistic" {
if char == "c" {
    break
  }
  print(char)
}
// print: s
// print: u
// print: p
// print: e
// print: r

Use Underscores

for _ in 1...3 {
  print("Ole")
}
// print: Ole
// print: Ole
// print: Ole

While Loop

var counter = 1
var stopNum = Int.random(in: 1...10)

while counter < stopNum {
  print(counter)
  counter += 1
}
// loop to print until the stop condition is met

A while loop accepts a condition and keeps executing its body code while the provided condition is true. If the condition is never false, the loop will keep running and the program will get stuck in an infinite loop

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