iOS 10 Programming for Beginners

Operations with our Integers

In our Playground, we know that numAge is an Int, but with Ints, we also can write arithmetic expressions using numbers, variables/constants, operators, and parentheses. Let's start with addition, subtraction, multiplication, and division. Add the following into Xcode:

// (+) operator
let numSum = 23 + 20
// (-) operator
let numResult = 32 - numSum
// (*) operator
let numTotal = numResult * 5
// (/) operator
let numDivide = numTotal / 10

So, numSum added two integers (+ operator) together, totaling 43 in our preceding example. Then, we subtracted (- operator) numSum from 32 to create numResult (−11 in our example). After ...