Datatype in one shot

Number:
```
 let num =10
 console.log(typeof num); // Output: "number"
```
Definition: Represents numeric data, including both integers and floating-point numbers.
String:
```
 let  str = "Hello, World!";
 console.log(typeof str); // Output: "string"
```
Definition: Represents a sequence of characters, enclosed within single quotes ('') or double quotes ("").
Boolean:
```
 let isTrue = true;
 console.log(typeof isTrue); // Output: "boolean"
```
Definition: Represents a logical value, either true or false, used for logical operations and conditions.
Undefined:
```
 let undefinedVar;
 console.log(typeof undefinedVar); // Output: "undefined"
```
Definition: Represents a variable that has been declared but has not been assigned a value.
Null:
```
 let nullVar = null;
 console.log(typeof nullVar); // Output: "object"
```
Definition: Represents the intentional absence of any object value. It is often used to signify a deliberate non-existence or invalid reference.
Symbol:
```
 let= Symbol('foo');
 console.log(typeof sym); // Output: "symbol"
```
Definition: Represents a unique and immutable data type used to identify object properties. Symbols are often used as keys in JavaScript objects to avoid naming conflicts.
Object:
```
 let= { key: 'value' };
 console.log(typeof obj); // Output: "object"
```
Definition: Represents a collection of key-value pairs, where keys are strings (or Symbols) and values can be of any data type, including other objects.