We have 7 types of primitive data types in JavaScript 1. Number: Floating point numbers. 2. String: Sequence of characters. 3. Boolean: Logical type that can only be true or false. 4. Undefined: Value taken by a variable that is not yet defined. 5. Null: It also means 'empty value'. 6. Symbol (ES2015): Value that is unique and cannot be changed. 7. BigInt (ES2020): Larger integers than the Number type can hold.