All About String in Swift Programming Language
Let’s know what is String, String is collection of characters
Here is how to declare a String
var courseName = "iOS Development" var language = "Swift"
Here is how to use functions like String Concatenation i.e. attaching one string to second string
var hello = "Hello, " let world = "World! " let sentence = hello + world + "This is iOS Development" // "Hello, world! This is iOS Development"
Important Note: As you can see above we have used “+” operator to concatenate two strings together
Here is how to use functions like String Interpolation i.e. A way to write some code in the middle of the string. The returned value of the code will turn into part of the string.
var courseName = "iOS Development" var language = "Swift" var software = "Xcode" var emotionEmoji = " 😍 " // Unicode Character i.e. Emoji Icon var swiftVersion = 3.0 // Double or Floating point Number
var fact = "\(courseName) in \(language) with \(software) is so fun! \(emotionEmoji) & we are using swift with version \(swiftVersion)" // So it will read as "iOS Development in Swift with Xcode is so fun! 😍 & we are using swift with version 3.0"
String Properties & Call methods using dot notation / operators
Here is how to check if s string is empty
fact.isEmpty // false
Convert all characters of string into upper / lower case
var name = "TheIronMan" name.lowercased() // It will appear as "theironman" name.uppercased() // It will appear as "THEIRONMAN"
Here is how we can compare if two string are identical for this we will use the logical equivalent (==) operator
let mySchool = "Harvard" let yourSchool = "Stanford"
mySchool == yourSchool // false
I hope this blog post will help you to better understand Strings in Swift Programming Language,
Thanks & Regards