Logical Operators | Swift Tutorial

Chapter 20 : Logical Operators

Topics Covered

What are Logical Operators
AND
OR
NOT
Examples

Logical operators are used to control the flow in Swift Programming.

They are mostly used with if, while, or some other control statement.

The result is a Bool value.

Logical operators are binary operators (except NOT !).

List of Logical Operators

Operator   Syntax		Result
=================================================================================
AND       op1 &&  op2		TRUE if both op1 and op2 are TRUE.
OR        op1 ||  op2		TRUE if either op1 or $op2 is TRUE.
NOT       !op			TRUE if op is not TRUE.

Example :


//
//  main.swift
//  Swift Tutorials 2014-15
//  Incrementing and Decrementing Operators in Swift
//
//  Created by Code2care on 16/09/14.
//  Copyright (c) 2014 Code2care. All rights reserved.
//

var a = 10
var b = 20
var c = 10
var d = 10


println(a == b && b == c)
println(a == c && c == d)


println(a == b || b == c)
println(a == b || c == b)

println(!(a == b))

Output :
false
true
false
false
true
Program ended with exit code: 0