Java Tutorial for Beginners - Java if-else statement with Examples

Variables are simply reserved memory locations for storing values. This means that when you create a variable, you reserve memory space.
The operating system allocates memory and decides what can be stored in it based on the data type of a variable. Because each type of data (such as integer, character, hexadecimal, packed decimal, and so on) is predefined as part of the programming language in Java, all constants or variables defined for a given program must be described with one of the data types.

the set aside memory As a result, by assigning different data types to variables, you can store integers, strings, and numbers.

In these variables, you can use decimals or characters.

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