Question

Which of the following unary operator is called as increment operator in Java?

• A. ##
• B. ++
• C. $$
• D. --

Hint:

The {++ operator} increases a variable by 1, while the {-- operator} decreases a variable by 1.

Answer 1

The Correct Option is B

Step 1: Understanding unary operators in Java.

In Java programming, an operator is a symbol used to perform operations on variables and values. Operators can be categorized into several types such as arithmetic operators, relational operators, logical operators, and unary operators.

A unary operator operates on only one operand. These operators are commonly used to increment, decrement, or negate a value.

Step 2: Meaning of increment operator.

The increment operator (++) is a unary operator used in Java to increase the value of a variable by 1. It can be used in two ways:

Pre-increment (++x): The value is increased first and then used in the expression.

Post-increment (x++): The current value is used first and then increased.

For example:

int x = 5;
x++;

After execution, the value of x becomes 6.

Step 3: Evaluation of options.

(A) ##: Incorrect. This symbol is not a valid operator in Java.

(B) ++: Correct. This is the increment operator in Java.

(C) $$: Incorrect. This symbol is not used as an operator in Java.

(D) --: Incorrect. This represents the decrement operator, which decreases the value by 1.

Step 4: Conclusion.

Therefore, the unary operator called the increment operator in Java is ++.

Final Answer: ++