Lesson 7: Booleans - Intro to Swift

Booleans Create a true/false value.

1let isSunny = true

2print(isSunny)

Terminal

$ swift main.swift

true

Every line, explained

let isSunny = true: A boolean (Swift calls the type Bool) can only be true or false, both lowercase. Swift names use camelCase: first word lowercase, every new word starting with a capital, like isSunny or highScore.
print(isSunny): 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. Printing a boolean shows the word true or false.