Course Content

Introduction to JavaScript

1. Getting Started

First Javascript Console Application Challenge: Showing some Output Challenge: Outputing Multiple Lines Dealing with Numbers Challenge: Working with Numbers Challenge: Calculating the Speed of a Car Challenge: Calculating Area of a Trapezium Outputting Multiple Values Challenge: Consoling Meaningful Output How to Use Comments in Javascript?Challenge: Adding a Comment Multi-Line Comments Challenge: Commenting out Code What Is JavaScript anyway?

2. Manipulating Data

Storing Data Challenge: Declaring a Variable Challenge: Accessing Data From a Variable Challenge: Fixing Variable Names Challenge: Reassigning a Variable Constants Challenge: Declaring & Using Constants Performing Arithmetic On Variables Challenge: Making a Salary Calculator Challenge: Adjusting Salary with a Bonus Exploring Primitive Data Types Challenge: Declaring a Boolean Value How different Data Types Interact Challenge: Concatenating Strings Challenge: Creating User Profile & Activity Details

3. Conditional Statements

Comparison Operators Challenge: Checking Age Eligibility The `if` Statement Challenge: Weather-Based Outfit Recommender Challenge: Even or Odd Nested Conditional Statements The `else` Clause Challenge: Improving Even or Odd Checker Challenge: Temperature Advisor The `else if` Clause Challenge: Grade Categorizer ` AND` Logical Operator Challenge: Checking if a Number is Even and Positive OR Logical Operator Challenge: Accessing Control System

4. Mastering Functions

What Are Functions?Challenge: Simple Function Challenge: Calculating the Speed of a Car Scopes Passing Data into Functions Challenge: Fixing the Speed Function Challenge: Improving the Grade Categorizer Task: Defining a Compound Function Returning Data from Functions Default Values Challenge: Email Auto-Responder with Default Parameters

5. Exploring Arrays

What Are Arrays?Challenge: Defining An Array Challenge: Indexing Adding Values to an Array Challenge: Pushing Elements to an Array Removing Elements from an Array Challenge: Practicing `pop` & `shift`The `length` Property Challenge: Counting Elements The `includes` Method Challenge: Searching for Animals in the Zoo

6. Discovering Loops

The `for` Loop Task: Printing a Sequence The `while` Loop Challenge: Printing Fibonacci Sequence The `do-while` Loop Challenge: Random Multiple of 7 Using Loops with Arrays Challenge: Finding the Average Price of Items Summary

The `do-while` Loop

The do-while is very similar to a while loop, except it is always executed at least once, even if the loop condition is false.

Another difference is that the code block is executed before the loop condition is checked.

The general syntax of a do-while loop is the following:

do {
  // code to execute
} while(boolean_expression);

The flowchart describes the execution process of a do-while loop:

For example, following is a program which uses a do-while loop to print the first ten even numbers:


              123456
            
let i = 1;

do { 
  console.log(i * 2);
  i += 1;
} while (i <= 10);

Even if we change the value of i, such that the condition becomes false, the code block will still execute at least once:


              123456
            
let i = 11;

do { 
  console.log(i * 2);
  i += 1;
} while (i <= 10);

1. What is the key difference between a `while` loop and a `do-while` loop?

2. What will be the output of the following code?

Everything was clear?

Thanks for your feedback!

Section 6. Chapter 5

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Course Content

Introduction to JavaScript

1. Getting Started

2. Manipulating Data

3. Conditional Statements

4. Mastering Functions

5. Exploring Arrays

6. Discovering Loops

The `do-while` Loop

The do-while is very similar to a while loop, except it is always executed at least once, even if the loop condition is false.

Another difference is that the code block is executed before the loop condition is checked.

The general syntax of a do-while loop is the following:

do {
  // code to execute
} while(boolean_expression);

The flowchart describes the execution process of a do-while loop:

For example, following is a program which uses a do-while loop to print the first ten even numbers:


              123456
            
let i = 1;

do { 
  console.log(i * 2);
  i += 1;
} while (i <= 10);

Even if we change the value of i, such that the condition becomes false, the code block will still execute at least once:


              123456
            
let i = 11;

do { 
  console.log(i * 2);
  i += 1;
} while (i <= 10);

1. What is the key difference between a `while` loop and a `do-while` loop?

2. What will be the output of the following code?

Everything was clear?

Thanks for your feedback!

Section 6. Chapter 5

Introduction to JavaScript

The `do-while` Loop

1. What is the key difference between a while loop and a do-while loop?

2. What will be the output of the following code?

Introduction to JavaScript

The `do-while` Loop

1. What is the key difference between a while loop and a do-while loop?

2. What will be the output of the following code?

1. What is the key difference between a `while` loop and a `do-while` loop?

1. What is the key difference between a `while` loop and a `do-while` loop?