For the love of loops

For loops allow you to execute code for each element in a collection or range.

How to do it...

Take a look at the following steps and code:

1. Let's imagine that we have an array of elements, and we want to do something with every item in the array:

let theBeatles = ["John", "Paul", "George", "Ringo"] 

2. We can use a for loop, which will extract each element of the array in turn, and will execute the given block of code for each element. The syntax of a for loop is as follows:

for <#each element#> in <#collection or range#> { 
    <#code to execute#> 
} 

3. So, to print all the musicians in the Beatles, let's loop through our theBeatles array and print each String element that the for loop provides:

for musician in theBeatles { 
    print(musician) 
} 

4. Perhaps you don't need to loop through an array, and just want to execute some code a set number of times. We can do this by providing a range instead of a collection:

// 5 times table 
for value in 1...12 { 
    print...