Operators and Type Conversion

Basic Operators

Arithmetic

• +, -, *, /
• % (modulus: division remainder)
• ++, -- (increment and decrement)

Comparison

• == (equality: ignores the data type).
• === (strict equality: recommended! Compares value and type).
• !=, !== (inequality).
• >, <, >=, <=

Logical

• && (AND)
• || (OR)
• ! (NOT)

Assignment

• =, +=, -=, *=, /=

Data Conversion (Casting)

Sometimes you need to transform one type into another:

// To Number
Number("123"); // 123
parseInt("10.5"); // 10
parseFloat("10.5"); // 10.5

// To String
String(123); // "123"
(123).toString(); // "123"

// To Boolean
Boolean(1); // true
Boolean(0); // false