Java Certification: Understanding Variables, Reference Variable , and Instance Variable

Описание: #Learnwithprofessor #Variables #ReferenceVariables
Variable:
A variable is a name given to a storage location in a programming language that holds a value. It acts as a container to store data temporarily during the execution of a program. Variables can be assigned different types of data, such as integers, , floating-point numbers or arrays. The value of a variable can change during the program's execution, depending on the operations performed on it.

Reference Variable:
A reference variable is a type of variable that stores the memory address of another variable rather than the actual value. In programming languages that support pointers or references (like C++, C#, or Java), a reference variable allows indirect access to the data stored at a specific memory location. This means that any changes made to the reference variable will affect the data in the memory location it points to.

Instance Variable:
An instance variable, also known as a member variable or an object variable, is a variable that is associated with a specific instance or object of a class in object-oriented programming.

Source Code:
class Person{
String name;
int age;
public Person(String name, int age){
this.name = name;
this.age = age;
}

public String getName(){
return this.name;
}
}

class VariableDemo{
public static void main(String[] args) {
int x = 10;
System.out.println(x);

Person p = new Person("Kumar", 30);
System.out.println(p.getName());

String message = new String("Hi There!");
System.out.println(message);
}
}

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