Contenu du cours

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 `else` Clause

Conditional Statements have an optional else clause which can be used to specify a block of code to be executed in case the boolean expression evaluates to false.

The syntax is as follows:

js

This way we don't need to write multiple if-statements to check for opposite conditions, making the code shorter and neater.


              1234567
            
let age = 18;

if(age >= 18) {
  console.log("The user is old enough to drive.");
} else {
  console.log("The user is not old enough to drive");
}

In the code above, we simply used an else block instead of rewriting a separate if-statement.

Tout était clair ?

Merci pour vos commentaires !

Section 3. Chapitre 7

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Posez n'importe quelle question ou essayez l'une des questions suggérées pour commencer notre discussion

Contenu du cours

Introduction to JavaScript

1. Getting Started

2. Manipulating Data

3. Conditional Statements

4. Mastering Functions

5. Exploring Arrays

6. Discovering Loops

The `else` Clause

Conditional Statements have an optional else clause which can be used to specify a block of code to be executed in case the boolean expression evaluates to false.

The syntax is as follows:

js

This way we don't need to write multiple if-statements to check for opposite conditions, making the code shorter and neater.


              1234567
            
let age = 18;

if(age >= 18) {
  console.log("The user is old enough to drive.");
} else {
  console.log("The user is not old enough to drive");
}

In the code above, we simply used an else block instead of rewriting a separate if-statement.

Tout était clair ?

Merci pour vos commentaires !

Section 3. Chapitre 7

Introduction to JavaScript

The `else` Clause

1. What is the purpose of the `else` clause in an if-else statement?

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

3. What happens if the `if` condition evaluates to `true`?

Introduction to JavaScript

The `else` Clause

1. What is the purpose of the `else` clause in an if-else statement?

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

3. What happens if the `if` condition evaluates to `true`?

Introduction to JavaScript

The `else` Clause

1. What is the purpose of the else clause in an if-else statement?

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

3. What happens if the if condition evaluates to true?

Introduction to JavaScript

The `else` Clause

1. What is the purpose of the else clause in an if-else statement?

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

3. What happens if the if condition evaluates to true?

1. What is the purpose of the `else` clause in an if-else statement?

3. What happens if the `if` condition evaluates to `true`?

1. What is the purpose of the `else` clause in an if-else statement?

3. What happens if the `if` condition evaluates to `true`?