Lesson 11: The OR Operator - Intro to Swift

The OR Operator Combine conditions with ||.

1let likesCats = true

2let likesDogs = false

3if likesCats || likesDogs {

4 print("You like animals!")

Terminal

$ swift main.swift

You like animals!

Every line, explained

let likesCats = true: let creates a constant: a named box whose value is set once and can never change. Swift people reach for let by default: if a value never needs to change, locking it down prevents accidents.
let likesDogs = false: let creates a constant: a named box whose value is set once and can never change. Swift people reach for let by default: if a value never needs to change, locking it down prevents accidents.
if likesCats || likesDogs {: if checks a condition. Swift style: no round brackets around the condition, but the curly braces { } are always required. || means OR: the whole condition is true if at least one side is true, and true || false is true.
print("You like animals!"): print(...) shows whatever is inside its round brackets in the terminal, then moves to a new line. All lowercase, both brackets needed, and no semicolon at the end; Swift doesn't use them.
}: This } closes the if block.