https://github.com/heyjaywilson/100daysofswiftui

100 Days of SwiftUI log
https://github.com/heyjaywilson/100daysofswiftui

Last synced: 11 days ago
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100 Days of SwiftUI log

• Host: GitHub
• URL: https://github.com/heyjaywilson/100daysofswiftui
• Owner: heyjaywilson
• Created: 2022-02-08T01:45:02.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-03-16T11:55:21.000Z (over 2 years ago)
• Last Synced: 2024-05-02T01:05:35.836Z (7 months ago)
• Language: Swift
• Size: 13.7 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# 100DaysOfSwiftUI

100 Days of SwiftUI log

## Table of Contents

- [Day 1: variables, constants, strings, and numbers](#day-1)

## Day 1

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

```swift

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 `\(variable name)`

```swift

let age = 32

let taylorSwift = "Taylor Swift is \(age)"

```

Whole numbers are called `Ints`

To separte whole numbers consider using `_` these will be ignored in Swift so

`100_000_000` = `100000000`

If using shortcut operators you must declare and initialize before using them.

```swift

var doubleCount += 5 // this will throw an error

```

```swift

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.