Exercise – Variables & Data Types

by heenan

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 num = 5;
var myBool = true;
var myString = 'Heena';

console.log(typeof num);
console.log(typeof myBool);
console.log(typeof myString);

// 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 + 2;
console.log(x);


// 3)
// Combine at least three strings together
// Log the result to the console
var first = "John";
var middle = "R";
var last = "Doe";

console.log(first + " " + middle + " " + last);

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

console.log(arr);

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

var arr2 = [6, 7, 8];
var arr3 = arr.concat(arr2);

console.log(arr3);

// 6) 
// Create an object literal that represents a person (perhaps you!)
// Define several properties within the object (name, hairColor, age, etc..)
// Define at least one proprety that references an array
//  favColors, siblings, etc...
// Log the object to the console
// And Log just "name" property to the console
// Then... Change the "name" property to something else
// And once again Log the object to the console
var colors = ['blue', 'pink'];
var person = {
	name: 'Heena',
  haircolor: 'black',
  age: 22,
  favColors: colors 
};

console.log(person);
console.log(person.name);
person.name = 'Batman';
console.log(person.name);
// 7) Bonus
// Add a function (method) to the...