Exercise – Variables & Data Types

by Colin Cheevers

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 a = "hello";
console.log(typeof a);
var b = 1;
console.log(typeof b);
var boo = true;
console.log(typeof boo);


// 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 xyz = 2 * 8;
console.log(xyz);

// 3)
// Combine at least three strings together
// Log the result to the console

var a = "Hello ";
var b = "JS ";
var c = "World";
console.log(a + b +c);


// 4)
// Create an array with at least 5 values stored inside
// Log the result to the console

var numCollect = [1,2,3,4,5];
console.log(numCollect);

// 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 numCollect2 = [6,7,8,9,10];
var numCollect3 = numCollect.concat(numCollect2);
console.log(numCollect3);

// 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 objPerson = {name : "Colin", siblings : ["John","Mark"], favoriteColors : ["Red", "Blue"]};
objPerson.foo = "hello";
console.log(objPerson);

// 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...