JAVA PROGRAMS

👉 Program below shows the basic difference between Post/Pre increment and decrement :

class unoperator

{

public static void main(String args[])

{

int a = 20;

System.out.println(a++);

System.out.println(a--);

System.out.println(++a);

System.out.println(--a);

}

}

OUTPUT 

Explanation:

The number which we have : 20

now...

                  

                                    (a++) time                                         (a--) time

21 only  in a memory not displaying the output 21 →→→ Now we have 21 that is 

updated value in a memory so it will print 21 and →→ in a memory decrements the number from 21 

                               (++a) time

to 20 →→→Now we have 20 in a memory so it will increment the value and then print the

 incremented value →→from 20 after increment it will print 21 and store this number in a memory  

                                        (--a) time

→→→Now we have 21 in a memory so it will decrement the value and then print the decremented

 value →→from 21 after decrement it will print 20 and store this number in a memory .