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Introduction to JavaScript
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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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Assignment Operators in JavaScript

Readability in code is essential, and JavaScript offers ways to make your code more elegant. In this chapter, we'll explore operations with assignments, which can streamline your code.

JavaScript provides several assignment operators:

  • Addition Assignment (+=);
  • Subtraction Assignment (-=);
  • Multiplication Assignment (*=);
  • Division Assignment (/=);
  • Remainder (Modulo) Assignment (%=);
  • Exponentiation Assignment (**=).

Assignment operators are used to enhance code readability.

Consider the following example:


              
123

            
let a = 17;
a += 5;
console.log(a);
copy

This code is equivalent to the following:


              
123

            
let a = 17;
a = a + 5;
console.log(a);
copy

The expression a += 5 accomplishes the same as a = a + 5.

Let's look at other assignment operators and their default counterparts:

With AssignmentDefault
a += 6a = a + 6
a -= 6a = a - 6
a *= 6a = a * 6
a /= 6a = a / 6
a %= 6a = a % 6
a **= 6a = a ** 6
question mark

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