Exercise - JS Variables

SOLUTION

by Ryan Morris

JavaScript

/**
 * Exercise:
 * Get to know your data types and variables
 *
 * Follow the directions below but feel free to experiment and veer off course.
 * Work in the console directly OR use "console.log()" to output to the console from the script.
 */

// 1)
// Declare 2 to 5 variables (name them as you like)
// Make at least one string, one number and one boolean. 
// Log the typeof each to the console
var x,
    y,
    z = "my string";

var num = 1;
var isItTrue = false;

console.log(typeof num);


// 2)
// Declare a new variable that stores the result of a mathematical expression
// You can add/multiply/divide/modulo any set of numbers 
// Log the result to the console
var x = 5 + 7;
x = 2;


// 3)
// Combine at least three strings together
// Log the result to the console
var myString = "string 1 " + " string 2 " + " string 3";


// 4)
// Create an array with at least 5 values stored inside
// Log the result to the console
var myArray = [1,2,3,4,5];
console.log(myArray);


// 5)
// Use Array.prototype.concat to add another array to your original array
//  var arr3 = arr1.concat(arr2);
// Log the result to the console

var newArray = myArray.concat([6,7,8]);

// 6) 
// Create an object literal that represents a person (perhaps you!)
// Define several properties within the object (name, hairColor, age, etc..)
// Define a property that stores an array ("siblings" or "favoriteColors")
// Log the object to the console
// Then Log ONLY the "name" property to the console
// Then Change the "name" property to something else, then log the object to the console

var me = {
    name: "Ryan",
    height: 6.3
}

me.name = "John";

me.lastName = "Morris";


// 7) Bonus
// Add a function (method) to the previous object you created to allow it to "speak" to the console. The function should expect a string argument and output "<object.name> said: <string>" to the console.

me.speak = function(str) {
    console.log(this.name + " says:" + str);
}