What Are the Core Data Type?


Larry Thompson

When it comes to programming, understanding data types is fundamental. Data types define the kind of values that can be stored and manipulated in a program.

In HTML, there are several core data types that you should be familiar with. Let’s take a closer look at them:

Numeric Data Types

Numeric data types are used to represent numbers. In HTML, there are two main numeric data types:

  • Integer: An integer is a whole number without any decimal places. It can be positive or negative.
  • Float: A float, also known as a floating-point number, represents numbers with decimal places.

String Data Type

A string is a sequence of characters enclosed in quotation marks (either single or double). It can contain letters, numbers, symbols, and whitespace. Strings are commonly used to store text-based data in HTML.

Boolean Data Type

A boolean data type can have one of two values: true or false. Booleans are often used for logical operations and conditional statements.

List Data Type

A list is an ordered collection of items. In HTML, you can create lists using the <ul> (unordered list) and <ol> (ordered list) tags.

  • Unordered List: An unordered list displays items with bullet points.
  • Ordered List: An ordered list displays items with numbers or letters.

null Data Type

The null data type represents the absence of any object value. It is often used to indicate that a variable has no value or is uninitialized.

undefined Data Type

The undefined data type is used when a variable has been declared but has not been assigned any value. It is often the default value of uninitialized variables.


Understanding the core data types in HTML is crucial for effective programming. By utilizing these data types, you can store and manipulate different kinds of values in your programs. Whether it’s numbers, text, lists, or logical values, having a solid grasp of data types will enhance your coding abilities.

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