Exercise – Variables & Data Types

by Diarmuid Dunne

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 name = "Diarmuid";
var boolean = true;
var num = 4;
// 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 sum = 24 +24;
console.log(sum);
// 3)
// Combine at least three strings together
// Log the result to the console
var str1 = "Diarmuid";
var str2 = "Dunne";
var str3 = "is my name";
console.log(str1 + " " + str2 + " " + str3);
// 4)
// Create an array with at least 5 values stored inside
// Log the result to the console
var array = [2, "Diarmuid", "Hello", 234, 5];
console.log(array);
// 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 = [2, 3, "String"];
var concatArray = array.concat(newArray);
// 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 sibling = [];
var person ={
    name : "Diarmuid",
    hairColor : "Brown",
    age : 22,
    sibling : ["Aoife", "Mary"]
};
console.log(person);
    
// 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:...