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‎chapter 3/app.js‎

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// Question# 1
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// Declare a variable called age & assign to it your age. Show
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// your age in an alert box.
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var age = 5;
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alert("I am" + " " + age + " " + "years old.");
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console.log("I am" + " " + age + " " + "years old.");
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// Question# 2
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// Declare & initialize a variable to keep track of how many
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// times a visitor has visited a web page. Show his/her
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// number of visits on your web page. For example: “You
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// have visited this site N times”.
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var visit_count;
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visit_count = 10;
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alert("You have visited this site" + " " + visit_count + " " + "times.");
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console.log("You have visited this site" + " " + visit_count + " " + "times.");
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// Question# 3
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// Declare a variable called birthYear & assign to it your
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// birth year. Show the following message in your browser:
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var birth_year = 2015;
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document.write("My birth year is" + " " + birth_year + "<br/>");
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document.write(
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"Data type of my declared variable is number" + "<br/>"
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);
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// Question# 4
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// A visitor visits an online clothing store
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// www.xyzClothing.com . Write a script to store in variables
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// the following information:
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// b. Product title
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// c. Quantity i.e. how many products a visitor wants to
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// order
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// Show the following message in your browser: “John
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// Doe ordered 5 T-shirt(s) on XYZ Clothing store”.
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var product_name = "T-Shirts";
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var quantity = 5;
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var visitor_name = "John Doe";
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document.write(`${visitor_name} ordered ${quantity} ${product_name} on XYZ Clothing store`);

‎chapter 3/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Chapter 3 Task | VARIABLES FOR NUMBERS </title>
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</head>
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<body>
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<script src="app.js"></script>
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</body>
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</html>

index.html renamed to chapter 4/index.html

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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>VARIABLES FOR NUMBERS</title>
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<title>Chapter 4 Task | VARIABLE NAMES: LEGAL & ILLEGAL </title>
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</head>
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<body>
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<script src="script.js"></script>

script.js renamed to chapter 4/script.js

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// Question# 1
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// Declare a variable called age & assign to it your age. Show
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// your age in an alert box.
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var age = 5;
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alert("I am" + " " + age + " " + "years old.");
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console.log("I am" + " " + age + " " + "years old.");
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// Question# 2
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// Declare & initialize a variable to keep track of how many
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// times a visitor has visited a web page. Show his/her
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// number of visits on your web page. For example: “You
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// have visited this site N times”.
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var visit_count;
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visit_count = 10;
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alert("You have visited this site" + " " + visit_count + " " + "times.");
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console.log("You have visited this site" + " " + visit_count + " " + "times.");
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// Question# 3
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// Declare a variable called birthYear & assign to it your
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// birth year. Show the following message in your browser:
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var birth_year = 2015;
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document.write("My birth year is" + " " + birth_year + "<br/>");
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document.write(
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"Data type of my declared variable is number" + "<br/>" + "<br/>"
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);
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// Question# 4
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// Declare 3 variables in one statement.
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var age;
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var year;
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var date;
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// Question# 5
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// Question# 2
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// Declare 5 legal & 5 illegal variable names.
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// ==============================================
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// 5 Legal Variable name
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// var class; //reserved key is not being used because it has already been reserved and cannot used as variable it throws error.
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// var car*name; //special characters cannot be used between variable but $ sign can be used.
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// Question# 6
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// Question# 3
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// Display this in your browser
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// a) A heading stating “Rules for naming JS variables”
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var rules_for_JS = "Rules for naming JS variables" + "<br/>" + "<br/>";

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