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Introduction to JavaScript
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

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Concatenating Strings in JavaScript

Let's explore some operations that you can perform with strings in JavaScript.

Concatenation

Concatenation is the process of combining two strings. This operation is achieved using the + operator:


              
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let wordOne = "Hello";
let wordTwo = "World";

console.log(wordOne + wordTwo);
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You can see that concatenation creates a new string by combining two words.

Note

String concatenation does not automatically add spaces. You need to manually include spaces like string1 + " " + string2.

Let's create a nicely formatted string through concatenation:


              
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let wordOne = "Hello";
let wordTwo = "World";

console.log(wordOne + ", " + wordTwo + "!");
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Concatenation with Assignment

The += operator allows you to add text to a string-type variable:


              
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let text = "Were";
text += "wolf";
text += "!";

console.log(text)
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question mark

What will be the output?

Select the correct answer

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Thanks for your feedback!

Section 3. Chapter 9
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