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Introduction to JavaScript
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Course Content

Introduction to JavaScript

Introduction to JavaScript

1. JavaScript Fundamentals
About JavaScriptUnderstanding JavaScript SyntaxChallenge: Console Output in JavaScriptUsing Comments to Document CodeChallenge: Write a Single-Line CommentChallenge: Write a Multi-Line Comment
2. Variables and Data Types in JavaScript
Understanding Variables in JavaScriptChallenge: Define the VariableUsing const for ConstantsExploring JavaScript Data TypesWorking with null in JavaScriptIntroduction to ArraysArray Methods and ManipulationChallenge: Perform Array Operations
3. Performing Operations in JavaScript
Understanding Assignment OperatorsMathematical Operations in JavaScriptAssignment Operators in JavaScriptIncrement and Decrement OperatorsChallenge: Variable Operations PracticeComparison Operators in JavaScriptLogical Operators ExplainedChallenge: Compare Variables in JavaScriptConcatenating Strings in JavaScriptChallenge: Build Sentences with JavaScript
4. Controlling Program Flow with Conditional Statements
Mastering if Statements in JavaScriptUsing else for Alternative OutcomesApplying else if for Multiple ConditionsChallenge: Determine Sizes with Conditionals
5. Looping Through Data in JavaScript
Understanding the while Loop in JavaScriptUsing the do while Loop for IterationChallenge: Print Numbers from 5 to 9Mastering the for Loop in JavaScriptChallenge: Console Tigers with LoopsBreaking Out of Loops with breakSkipping Iterations with continueChallenge: Stop and Skip in Loops
6. Functions in JavaScript
What Are Functions in JavaScript?Defining Functions in JavaScriptChallenge: Write a Function – My NameUsing Function Arguments EffectivelyReturning Values from FunctionsChallenge: Create a Sum FunctionCourse Summary & Next Steps

book
Understanding JavaScript Syntax

JavaScript follows a default syntax with parentheses, curly brackets, and semicolons.

Let's create a simple program and delve into its syntax. In JavaScript, you don't need to define a main function as required in languages like C, C++, Java, GoLang, etc. You can directly write your code:


              
1

            
console.log("Hello, user!");
copy

In the example above, we've crafted a program that uses the console.log() method to print Hello, user! to the console.

Now, let's break down the syntax:

  • To begin, we employ the console.log() method. This method serves the purpose of printing values in the console;
  • Following that, we place "Hello, user!" within this method, enclosed in parentheses ();
  • The quotes (" or ') serve as indicators to JavaScript, signifying that Hello, user! is plain text and not a function or any other program-related keyword;
  • Lastly, the semicolon (;) functions as the command terminator, marking the conclusion of a command.

A program comprises a series of commands. If you intend to print text multiple times, you can utilize the semicolon ; to signal the end of each command:


              
123

            
console.log("Command 1");
console.log("Command 2");
console.log("Command 3");
copy

In the example above, the semicolon ; serves as the separator for the three commands in our code:

  • The first command is console.log("Command 1") followed by ; (indicating the end of this command);
  • Subsequent commands are structured similarly.

1. What is the purpose of the console.log() method?

2. Why do we use quotes (" or ') around text like "Hello, user!"?

question mark

What is the purpose of the console.log() method?

Select the correct answer

question mark

Why do we use quotes (" or ') around text like "Hello, user!"?

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 2

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course content

Course Content

Introduction to JavaScript

Introduction to JavaScript

1. JavaScript Fundamentals
About JavaScriptUnderstanding JavaScript SyntaxChallenge: Console Output in JavaScriptUsing Comments to Document CodeChallenge: Write a Single-Line CommentChallenge: Write a Multi-Line Comment
2. Variables and Data Types in JavaScript
Understanding Variables in JavaScriptChallenge: Define the VariableUsing const for ConstantsExploring JavaScript Data TypesWorking with null in JavaScriptIntroduction to ArraysArray Methods and ManipulationChallenge: Perform Array Operations
3. Performing Operations in JavaScript
Understanding Assignment OperatorsMathematical Operations in JavaScriptAssignment Operators in JavaScriptIncrement and Decrement OperatorsChallenge: Variable Operations PracticeComparison Operators in JavaScriptLogical Operators ExplainedChallenge: Compare Variables in JavaScriptConcatenating Strings in JavaScriptChallenge: Build Sentences with JavaScript
4. Controlling Program Flow with Conditional Statements
Mastering if Statements in JavaScriptUsing else for Alternative OutcomesApplying else if for Multiple ConditionsChallenge: Determine Sizes with Conditionals
5. Looping Through Data in JavaScript
Understanding the while Loop in JavaScriptUsing the do while Loop for IterationChallenge: Print Numbers from 5 to 9Mastering the for Loop in JavaScriptChallenge: Console Tigers with LoopsBreaking Out of Loops with breakSkipping Iterations with continueChallenge: Stop and Skip in Loops
6. Functions in JavaScript
What Are Functions in JavaScript?Defining Functions in JavaScriptChallenge: Write a Function – My NameUsing Function Arguments EffectivelyReturning Values from FunctionsChallenge: Create a Sum FunctionCourse Summary & Next Steps

book
Understanding JavaScript Syntax

JavaScript follows a default syntax with parentheses, curly brackets, and semicolons.

Let's create a simple program and delve into its syntax. In JavaScript, you don't need to define a main function as required in languages like C, C++, Java, GoLang, etc. You can directly write your code:


              
1

            
console.log("Hello, user!");
copy

In the example above, we've crafted a program that uses the console.log() method to print Hello, user! to the console.

Now, let's break down the syntax:

  • To begin, we employ the console.log() method. This method serves the purpose of printing values in the console;
  • Following that, we place "Hello, user!" within this method, enclosed in parentheses ();
  • The quotes (" or ') serve as indicators to JavaScript, signifying that Hello, user! is plain text and not a function or any other program-related keyword;
  • Lastly, the semicolon (;) functions as the command terminator, marking the conclusion of a command.

A program comprises a series of commands. If you intend to print text multiple times, you can utilize the semicolon ; to signal the end of each command:


              
123

            
console.log("Command 1");
console.log("Command 2");
console.log("Command 3");
copy

In the example above, the semicolon ; serves as the separator for the three commands in our code:

  • The first command is console.log("Command 1") followed by ; (indicating the end of this command);
  • Subsequent commands are structured similarly.

1. What is the purpose of the console.log() method?

2. Why do we use quotes (" or ') around text like "Hello, user!"?

question mark

What is the purpose of the console.log() method?

Select the correct answer

question mark

Why do we use quotes (" or ') around text like "Hello, user!"?

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 2
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