Exercise3 : Declaring / modifying / displaying an array. Declaring / modifying / displaying key-valued array. Creating empty array & key-valued empty array.

Exercise3.swift

//: Playground - noun: a place where people can play
// The Swift Programming Language
// Basics of Array & key-valued array

import UIKit

var str = "Hello, playground"

// creating / declaring an array
var shoppingList = ["catfish", "water", "tulips", "blue paint"]

// modifying the array element
shoppingList[1] = "bottole of water"

// displaying the value of an array
println(shoppingList)

// declaring dictionary(key valued array)
var occupations = [
    "sagar" : "ios s/w dev",
    "ankit" : "ios s/w dev",
    "samurai" : "cartoon character"
]

// displaying dictionary(key valued array)
println(occupations)

// adding value to dictionary(key valued array)
occupations["amit"] = "system admin"

// displaying dictionary(key valued array)
println(occupations)

// declaring empty array
let myEmptyArray = []

// declaring an empty array with string data type
let myEmptyStringArray = [String]()

// declaring an empty dictionary(key valued array)
let myKeyValuedEmptyArray = [:]

// declaring an empty dictionary(key valued array) with specific data type
let myEmptyKeyValuedArrayWithType = [String:Float]()