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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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Challenge: Perform Array Operations

Task

  1. Create an array named myArray with the given data: ["Heine", 25, "Bob", 16].
  2. Remove the last element, 16, from the array.
  3. Add a new element with the value 21 to the end of the array.
  4. Replace the second element with the value 27 using indexing.
  5. Print the updated array to the console.

              
12345

            
let ___ = ["Heine", 25, "Bob", 16];
myArray.___();
myArray.___(21);
myArray[___] = 27;
console.log(___);
copy

The output should be :

python
  1. Use theΒ pop()Β method to remove an element from the end of an array.
  2. Use theΒ push()Β method to add an element to the end of an array.
  3. Access the second element in the array using the indexΒ 1.
  4. To log the array data to the console, use theΒ console.log()Β with the array name.

              
12345

            
let myArray = ["Heine", 25, "Bob", 16]; // Step 1
myArray.pop();         // Step 2
myArray.push(21);      // Step 3
myArray[1] = 27;       // Step 4
console.log(myArray);  // Step 5
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SectionΒ 2. ChapterΒ 8
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