100 Days of SwiftUI log
Table of Contents
Variables store values and can be changed multiple times
var is used to declare variables
Constants store values and cannot be changed after the initial assignment
let is used to declare constants
Strings are enclosed with
Example of multiline string
let multiLineString = """ Here is a multi line string Notice the opening triple \" and the closing triple \" """
Useful functions for Strings
.hasPrefix() checks to see if the string begins with the passed in arg
.hasSuffix() checks to see if the string ends with the passed in arg
To use variables inside strings use
let age = 32 let taylorSwift = "Taylor Swift is \(age)"
Whole numbers are called
To separte whole numbers consider using
_ these will be ignored in Swift so
If using shortcut operators you must declare and initialize before using them.
var doubleCount += 5 // this will throw an error
var doubleCount = 0 doubleCount += 5 // this will not fail
Decimal Numbers are called Doubles
number types can be changed to another number type but a string cannot change into a number type.