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iOS Swift 2.0 Basics Swift Operators Working With Operators: Part 2

Swift 2.0 LevelScore

Challenge Task 1 of 2 i am lost need help....

Let's assume we're creating a silly game. In this game every time a user completes an objective (whatever it is) we increment their total score by 1 point.

In the editor below, initialScore is the players current score. Assuming they completed a single objective for this level, let's add 1 point to their score using the increment operator and assign the result to a constant named totalScore.

Remember that the position of the unary increment operator matters. For this task to pass, we want both totalScore and initialScore to have the same value after the increment operation.

operators2.swift
// Enter your code below

var initialScore = 8
var levelScore = 8
levelScore = levelScore + 1

let totalScore = 9 

1 Answer

HI there,

In this challenge you're asked to use the unary increment operator; that is ++.

You can place the ++ before or after the variable name. While both will increment the value of that variable, placing the ++ first means the increment is done first, which is what we want here.

The code would look like:

var initialScore = 8
let totalScore = ++initialScore

Steve.