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 that, we took numResult and multiplied (* operator) it by 5 (see -55 in the Results panel). All of this is pretty basic math—however, you may have noticed something different with our division equation (/ operator). When you divide two integers, the result will be a third integer. So, instead of -55 divided by 10 equaling -5.5, our result was ...