In this Problem, you will learn about variables, how to create them, and different data types that Java programming language supports for creating 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.
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:
Try the following example in the editor below.
You have to assign the following values in the variable:
To read more about java data-types and variables click here.