Repeat While loop

The Repeat While loop is same as while loop but a difference that the body of repeat...while loop is executed once before the test expression is checked.

Syntax:

repeat {
    // statements
    ...
} while (testExpression)

In this loop, the body of repeat while loop is executed once and after that testExpression is checked.

Flowchart of Repeat While loop

Example:

var currentLevel:Int = 0, finalLevel:Int = 5
let gameCompleted = true
repeat {
    //play game
    if gameCompleted {
        print("You have successfully completed level \(currentLevel)")
        currentLevel += 1
    }
} while (currentLevel <= finalLevel)
print("Terminated! outside of repeat while loop")

Output:

You have successfully completed level 0
You have successfully completed level 1
You have successfully completed level 2
You have successfully completed level 3
You have successfully completed level 4
You have successfully completed level 5
Terminated! outside of repeat while loop

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