Now you know all the basic types in Swift, we can start to put them together using operators. Operators are those little mathematical symbols like
-, and Swift has a huge range of them.
Here are a couple of test variables for us to work with:
let firstScore = 12 let secondScore = 4
We can add and subtract using
let total = firstScore + secondScore let difference = firstScore - secondScore
And we can multiply and divide using
let product = firstScore * secondScore let divided = firstScore / secondScore
Swift has a special operator for calculating remainders after division:
%. It calculates how many times one number can fit inside another, then sends back the value that’s left over.
For example, we set
secondScore to 4, so if we say
13 % secondScore we’ll get back one, because 4 fits into 13 three times with remainder one:
let remainder = 13 % secondScore
Upgrade to premium
The Hacking with Swift guide book helps you learn faster, plus get an Xcode tips and tricks video and Swift wall chart.