Javascript Programming Tutorials, Guides & Best Practices

• == performs type coercion.
• === ensures both value and type match.

• Logical operators evaluate left to right; ensure your conditions are correct.

• Initialize counter to 10.
• Use both prefix and postfix increment/decrement operators and observe the outputs.

     let counter = 10;
     console.log(counter++); // 10
     console.log(counter);   // 11
     console.log(++counter); // 12
     console.log(counter--); // 12
     console.log(counter);   // 11
     console.log(--counter); // 10

• Primitives hold a single value and are immutable.
• Non-primitives hold collections or behaviors and are mutable.

Example:

Used for very large integers beyond the safe range of number.

• Syntax: Append n to the end of an integer.
• Example:

• Used in older JavaScript versions but largely replaced by let and const.
• Example:

     var message = "Hello, World!";
     console.log(message);