What Is Data Type and Examples?
In programming, a data type is an attribute of a variable that determines the type of data it can store. It defines the operations that can be performed on the variable and the way it is stored in memory.
Numeric Data Types
Numeric data types are used to store numbers. In HTML, you can use the following data types:
- int – represents integers, such as 1, 10, -5.
- float – represents floating-point numbers with decimal places, like 3.14, -0.5.
String Data Type
The string data type is used to store text. It can include letters, numbers, symbols, and spaces. In HTML, strings are defined by enclosing them in quotation marks:
<code> var name = "John Doe"; </code>
Boolean Data Type
The boolean data type has two possible values: true or false. It is often used for logical operations and conditions. For example:
<code> var isReady = true; var isLoggedOut = false; </code>
List Data Types
In HTML, you can use lists to represent collections of items. There are two types of lists:
Ordered List (ol)
An ordered list represents items in a specific order using numbers or letters:
<code> <ol> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ol> </code>
Unordered List (ul)
An unordered list represents items without any specific order using bullet points:
<code> <ul> <li>Item A</li> <li>Item B</li> <li>Item C</li> </ul> </code>
Data types are essential in programming as they define the type of data a variable can hold and the operations that can be performed on it. Understanding data types is crucial for writing efficient and error-free code.
Now that you have learned about numeric, string, boolean, and list data types, you can start using them in your HTML projects to store and manipulate different kinds of information.