Java Program To Increment and Decrement Operators Example

/*
        Increment and Decrement Operators Example
        This example shows how to use Java increment operator (++) and decrement
        (--) operator.
*/

public class IncrementDecrementOperatorExample {

        public static void main(String[] args) {
             
                /*
                 * Java increment operator ++ increases its operand's value by one
                 * while decrement operator -- decreases its operand's value by
                 * one as given below.
                 */
               
                 int i = 10;
                 int j = 10;
               
                 i++;
                 j++;
               
                 System.out.println("i = " + i);
                 System.out.println("j = " + j);
               
                 /*
                  * Increment and decrement operators can be used in two ways,
                  * postfix (as given in above example) and prefix.
                  *
                  * In normal use, both form behaves the same way. However, when they
                  * are part of expression, there is difference between these
                  * two forms.
                  *
                  * If prefix form is used, operand is incremented or decremented
                  * before substituting its value.
                  *
                  * On the other hand, if postfix form is used,
                  * operand's old value is used to evaluate the expression.
                  *
                  * Simple example would be,
                  */
               
                  /*
                   * Here, value of i would be assigned to k and then its
                   * incremented by one.
                   */
                  int k = i++;
               
                  /*
                   * Here, value of j would be incremented first and then
                   * assigned to k.
                   */
                  int l = ++j;
               
                  System.out.println("k = " + k);
                  System.out.println("l = " + l);
               
               
        }
     
}

/*
Output would be
i = 11
j = 11
k = 11
l = 12
*/