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Datatypes

In this Problem, you will learn about variables, how to create them, and different data types that Java programming language supports for creating variables.

 

Java Variables:

A variable is a location in memory (storage area) to hold data. To indicate the storage area, each variable should be given a unique name (identifier).

How to declare variables in Java? Here's an example to declare a variable in Java.

 int speedLimit = 80;

Here, speedLimit is a variable of int data type and is assigned value 80. Meaning, the speedLimit variable can store integer values.

Java is a statically-typed language. This means that all variables must be declared before they can be used.

 int speed;

Here, speed is a variable, and the data type of the variable is int. The int data type determines that the speed variable can only contain integers.

In simple terms, a variable's data type determines the values a variable can store. There are several data types predefined in Java programming language, known as primitive data types.

Some of the common data types you need to know:

  • int
  • String
  • char
  • boolean

Try the following example in the editor below.

You have to assign the following values in the variable:

  • "InterviewBit" should be assigned in the variable named mystring1.
  • "Don't change the variable name" should be assigned in the variable named mystring2.
  • 11 should be assigned in the variable named myint.
  • true should be assigned in the variable named myboolean.

NOTE:

To read more about java data-types and variables click here.

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