What Is the Data Type for Int?


Heather Bennett

In programming, the int data type is used to represent integers. An integer is a whole number without any decimal places. Integers can be positive, negative, or zero.

Declaring an int Variable

To declare a variable of type int in most programming languages, you need to specify the data type followed by the variable name. For example:

int myNumber;

This declares a variable named myNumber of type int. You can assign values to this variable later in your code.

Range of Integers

The range of values that an int can hold depends on the programming language and the architecture of the computer system. In most programming languages, the range for an int is typically from -2,147,483,648 to 2,147,483,647.

Casting Integers

Sometimes you may need to convert an integer into another data type. This process is called casting. For example, if you have an int and you want to convert it into a float or double data type to include decimal places:

int myInt = 10;
float myFloat = (float)myInt;
double myDouble = (double)myInt;

In this example, we are casting the value stored in myInt into both float and double data types.

Arithmetic Operations with Integers

You can perform various arithmetic operations with integers such as addition (+), subtraction (-), multiplication (*), and division (/). Here’s an example:

int num1 = 10;
int num2 = 5;

int sum = num1 + num2;
int difference = num1 - num2;
int product = num1 * num2;
int quotient = num1 / num2;

In this example, we are performing basic arithmetic operations on two int variables, num1 and num2. The results are stored in separate int variables.


The int data type is essential in programming for working with whole numbers. It provides a way to store and manipulate integers in various operations. Understanding the int data type is crucial for writing efficient and accurate code.

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