Swift Quick Syntax Reference

Chapter    22

Loops

When you want to repeat operations, you can use loops. Loops give you a neat way to do something a set number of times or to do operations until a certain condition (that you define) is met. Collection types such as arrays and dictionaries use loops for iteration.

for-condition-increment Loop

This for loop will be familiar to many programmers. The for-condition-increment loop gives you a loop that will execute a set number of times. You will have to use the for keyword along with an ending condition and an increment statement.

The loop shown in Listing 22-1 prints out 1 through 10 to the console as an example.

Listing 22-1. for-condition-increment Loop

for var i = 1; i <= 10; ++i {    println("i = \(i)")}

Let’s look at the ...