Looping In Reverse in Swift in Swift

A for loop can also count backwards, as long as we define the right conditions. For example:

for i in stride(from: 7, through: 3, by: -1) {
    print(i)
}

The output of this code is:

7
6
5
4
3

Let's break down this code:

• The initialization statement is from: 7, so we start iterating from number 7.

• We loop as long as the value is > 2, so we'll end at number 3. We could've written through: 3 and it would still be correct.

• The iteration statement is by: -1, so we decrease our number by 1 every time.

Assignment

Let's print all numbers from 5 through -5 in decreasing order.

Hint
Look at the examples above if you get stuck.