JS Data Types
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JS Data Types
In JavaScript, there are several data types that can be used to store and manipulate values. The most commonly used data types in JavaScript are:
- Numbers: Used to store numeric values, including integers and decimals.
Example:
let x = 5; // Integer
let y = 3.14; // Decimal
- Strings: Used to store textual data.
Example:
let firstName ="John";
let lastName = 'Doe';
- Booleans: Used to store true/false values.
Example:
let isAlive = true;
let isHungry = false;
- Undefined: Used to represent a variable that has not been assigned a value.
Example:
let x; // Undefined
- Null: Used to represent a variable that has been explicitly assigned a value of null.
Example:
let x = null;
6. Objects: Used to store collections of data as key-value pairs.
Example:
let person = { firstName:
"John", lastName: "Doe", age: 30 };
- Arrays: Used to store collections of data as a list.
Example:
let fruits = ["apple",
"banana", "orange"];
- Symbols: Used to create unique identifiers for objects.
Example:
console.log( 'Code is Poetry' );const mySymbol = Symbol();
These data types can be used in a variety of ways to manipulate and store data in JavaScript, and it’s important to understand how they work and how to use them effectively in your code.
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