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Introduction to JavaScript
course content

Course Content

Introduction to JavaScript

Introduction to JavaScript

1. Basic Concepts
About JavaScriptSyntaxChallenge: Console OutputCommentsChallenge: Single-line CommentChallenge: Multi-line Comment
2. Variables and Data Types
VariablesChallenge: Defining the VariableconstData Types OverviewnullArrayArray MethodsChallenge: Array Operations
3. Basic Operations
AssignmentMathematical OperationsOperations with AssignmentIncrement and DecrementChallenge: Variable OperationsComparison OperationsLogical OperationsChallenge: Comparing VariablesString ConcatenationChallenge: Sentence Building
4. Conditional Statements
ifelseelse ifChallenge: Determining Size
5. Loops
whiledo whileChallenge: Printing Numbers from 5 to 9forChallenge: TigersbreakcontinueChallenge: Stopping and Skipping
6. Functions
What is a Function?DefinitionChallenge: My NameArgumentsreturnChallenge: SumSummary

book
Increment and Decrement

Increment and Decrement are operations used to increase or decrease a variable's value by 1.

Increment

The increment operation is performed using the ++ operator:


              
1234567

            
let a = 0;
a++;
console.log(a);
a++;
console.log(a);
a++;
console.log(a);
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Note

The expression a++ is equivalent to a = a + 1 or a += 1.

Decrement

The decrement operation is performed using the -- operator:


              
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let a = 5;
a--;
console.log(a);
a--;
console.log(a);
a--;
console.log(a);
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Note

The expression a-- is equivalent to a = a - 1 or a -= 1.

Increment and decrement operations are frequently used in loops, which we will discuss in more detail later.

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Choose the correct result:

Select the correct answer

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Section 3. Chapter 4
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