Datatype : Boolean | Swift Programming Language Tutorial

Booleans are logical data type that can have only two values. true or false.

What is a Booleans

In Swift programming the Boolean type is called as Bool

var varName:Boolean = true/false

var varName = true/false


//
//  main.swift
//  Swift Tutorials 2014-15
//  Boolean in Swift
//
//  Created by Code2care on 15/09/14.
//  Copyright (c) 2014 Code2care. All rights reserved.
//


var myBoolA:Bool = true
var myBoolB = false


println("\(myBoolA)")
println("\(myBoolB)")

Output :

true
false
Program ended with exit code: 0

Note : Booleans are mostly used to compare two values with if statements,


//
//  main.swift
//  Swift Tutorials 2014-15
//  Boolean in Swift
//
//  Created by Code2care on 15/09/14.
//  Copyright (c) 2014 Code2care. All rights reserved.
//



var a  = 20;
var b = 20;

/*
== operator is used to test equality of the two variables.

If both values are same, If condition returns True, else False
*/

if(a == b) {
    println("Both values are equal!");
}

if(a > b) {
    println("var1 is greater then var2 values are equal!");
}

Output :

Both values are equal!
Program ended with exit code: 0