local variable in java programming (V6)

 

        1. Java Variable Types

Java variables are of three types:

• Local variables
• Instance variables
• Class/Static variables

        2. Java Local Variables

• Local variables are declared within methods, constructors, or blocks.
• Local variables are created when the method, constructor, or block is entered, and the variables are destroyed when it exits.
• Access modifiers cannot be used for local variables.
• Local variables can be used only within the method, constructor, or block in which they are declared.
• Local variables are implemented at the inner level.
• There is no default value for local variables, so they must be declared and initialized before being used for the first time.

Source Code:

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public class LocalVariable {

	public static void main(String[] args) {
		
		int age = 25; // Local variable declared and initialized in main method
        System.out.println("Age: " + age);

        // Calling a method that uses its own local variables
        calculateSquare(5);

        // Using local variables in a loop
        for (int i = 1; i <= 3; i++) { // 'i' is a local variable for this loop
            System.out.println("Loop iteration: " + i);
		}
	}
	public static void calculateSquare(int number) {
        int square = number * number; // Local variable to this method
        System.out.println("Square of " + number + " is: " + square);
    }	
}

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