JavaScript if-else Statements

The if-else statement is one of the core control structures in JavaScript. It allows developers to run specific blocks of code based on whether a given condition is true or false.

Syntax of if, if-else, and if-else if

1. Basic if Statement

2. if-else Statement

3. if-else if-else Chain

Example 1: Basic if Statement

Example 2: Using if-else

Example 3: if-else if Ladder

Real-World Use Case

Best Practices

• Always use curly braces {} for better readability and to avoid errors
• Use === for strict equality comparisons to avoid type coercion issues
• Avoid excessive nesting of if blocks; refactor into functions or use switch-case when appropriate

Key Takeaways

• if-else is used for conditional branching in JavaScript
• if block runs when condition is true
• else block runs when condition is false
• else if allows multiple conditions to be checked in sequence
• Crucial for building dynamic and responsive logic in applications