Java Declaring and Initializing Variables - Java Tutorial - Appficial

A variable is a memory location to store data, such as an integer or floating point number. First you need to declare a variable, using the proper data type such as int or double, respectively. Multiple variables can be declared in one Java statement. Second you typically assign it a value.

The very first time you assign a variable a value is called initialization. Not initializing a variable is a common error in programming. The compiler creates memory on the Java Stack to store the variables
So when you read or print a variable, it’s value is coming from the variable’s memory location.

The assignment statement looks like this : identifier = value;

You first need to declare the data type of the identifier using one of the 8 primitive data types: int, byte, short, long, double, float, char, and boolean. The = sign is called the assignment operator. The right hand of the = sign can be a value or an expression

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