for in loops

// This for-in loop will loop 10 times.
// The first time through, number will be 0.
// The second iteration, number will be 1.
// And so on. The last time through, number will be 9
for number in 0...9 {
    println(number)
}

// It is the same as this standard for-loop
for var number = 0; number <= 9; number++ {
    println(number)
}

// My favorite use, for the for-in, is when I want to iterate through an array, to print, edit, //compare etc. And I need a variable containing the current element.

// So, you have an array of names, and you want to print each name.
var names = ["John", "Adam", "Bill", "Dave"]


// You can cleanly iterate, and print each name
for aName in names {
    println(aName)
}

// That same code with a standard for-loop, would look like this;
for var index = 0; index < names.count; index++ {
    let aName = names[index]
    println(aName)
}