Syntax error Interesting facts about Increment and Decrement operators in Java

Interesting facts about Increment and Decrement operators in Java

There are many interesting facts with respect to increment and decrement operators in Java. We will discuss a few of them with examples −

  • The increment and decrement operators can’t be used with the ‘final’ variables. This is due to the fact that variables associated with ‘final’ keyword can’t be changed −

Example

 Live Demo

public class Demo{
   public static void main(String[] args){
      final int my_val = 34;
      int my_val_2 = ++my_val;
      System.out.println("The value is :");
      System.out.println(my_val_2);
   }
}

Output

/Demo.java:6: error: cannot assign a value to final variable my_val
int my_val_2 = ++my_val;
         ^
1 error

  • Nesting the ‘++’ and ‘- -‘ operator isn’t possible or rather not allowed.

Example

 Live Demo

public class Demo{
   public static void main(String[] args){
      int my_val_1 = 99;
      int my_val_2 = ++(++my_val_1);
      System.out.println("The value is ");
      System.out.println(my_val_2);
   }
}

Output

/Demo.java:6: error: unexpected type
int my_val_2 = ++(++my_val_1);
          ^
required: variable
found: value
1 error
Updated on: 2020-07-04T08:19:58+05:30

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