Which Two Number Types Can Be Used as a Data Type?


Heather Bennett

In programming, data types are used to define the type of data that can be stored in a variable. There are various data types available in programming languages, and each has its own purpose and characteristics. When it comes to numbers, there are two main number types that can be used as data types: integers and floating-point numbers.


An integer is a whole number without any decimal places. It can be either positive or negative.

In programming languages, integers are often represented using the int keyword. For example:

int myInteger = 10;

Here, myInteger is a variable of integer type with a value of 10.

Integers are commonly used for counting and indexing purposes. They provide an efficient way to store whole numbers without any loss of precision.

Floating-Point Numbers

A floating-point number, also known as a real number or a decimal number, is a number that contains decimal places. Floating-point numbers are often represented using the float or double keyword in programming languages.

float myFloat = 3.14;
double myDouble = 3.14159265359;

In the above example, myFloat is a variable of float type with a value of 3.14, while myDouble is a variable of double type with a value of 3.14159265359.

Floating-point numbers are commonly used for calculations requiring decimal precision, such as scientific calculations or financial applications. However, it’s important to note that floating-point numbers may have limitations in terms of precision due to their internal representation.


In conclusion, when it comes to numbers as data types in programming, integers and floating-point numbers are the two main options. Integers are used for whole numbers without decimal places, while floating-point numbers are used for numbers with decimal precision. Understanding these number types and their characteristics is crucial for effectively working with numerical data in programming.

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