# How Many Types of Number Data Type Are There?

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Scott Campbell

In programming, numbers are a crucial part of data manipulation. They allow us to perform calculations, make comparisons, and store numerical information.

In HTML, there are several types of number data types that you can use depending on the specific requirements of your project. Let’s dive into the different types of number data types in HTML.

## 1. Integer

An integer is a whole number without any fractional or decimal parts.

It can be either positive or negative. In HTML, integers are commonly used for counting and indexing purposes.

## 2. Float

A float is a number with both an integer and fractional part.

It can represent both positive and negative values as well as decimal numbers. Floats are useful when precision is required, such as in scientific calculations or financial applications.

## 3. Double

A double is similar to a float but has twice the precision.

It can hold larger values and provide more significant digits after the decimal point. Doubles are commonly used in complex mathematical calculations and simulations.

## 4. NaN

NaN stands for “Not a Number.” It represents an undefined or unrepresentable value resulting from an invalid operation or calculation in JavaScript or other programming languages that support NaN as a data type.

## 5. Infinity

Infinity represents a value greater than any other number in JavaScript or other programming languages that support it as a data type. It commonly occurs when dividing by zero or when the result of a calculation exceeds the maximum representable value.

### The code snippet below illustrates how these different number data types can be declared:

``````
<script>
let integer = 42;
let float = 3.14;
let double = 2.71828;
let nan = NaN;
let infinity = Infinity;
</script>
``````

### Conclusion

Numbers play a vital role in programming, and HTML provides various data types to handle different numerical scenarios. Whether you’re working with whole numbers, decimal values, or need to represent undefined or infinite values, HTML has got you covered with its integer, float, double, NaN, and infinity data types. By understanding these different number data types, you can effectively manipulate and process numerical information in your web applications.