Control Flow: For-In Loops

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This tutorial belongs to the Swift series

for-in loops can be used to iterate a specific number of times using a range operator:

for index in 0...3 {
  // iterate 4 times; index is 0, 1, 2, 3
}

You can iterate over the elements of an array or set:

let list = ["a", "b", "c"]
for item in list {
  // `item` contains the element value
}

You can also iterate over the elements of a dictionary:

let dict = ["a": 1, "b": 2, "c": 2]
for (key, value) in dict {
  // key contains the dictionary key
  // value contains the dictionary value
}

0:	Introduction
1:	If Statements
2:	Switch Statements
3:	Ternary Operator
4:	▶︎ For-In Loops
5:	While Loops
6:	Repeat-While Loops
7:	Control Transfer Statements