What does the % operator do in Java?

• A. It divides two numbers and returns the quotient.
• B. It checks if the first number is greater than the second.
• C. It returns the remainder of dividing the first operand by the second.
• D. It performs an exponentiation operation.

Answer: (C)

The % operator in Java is known as the modulus operator. Its primary function is to return the remainder of the division of one number (the first operand) by another (the second operand). For example, if you have an expression like 7 % 3, it performs the division of 7 by 3, which equals 2 with a remainder of 1. Therefore, 7 % 3 would yield 1, since that is the remainder left after the whole number division.

This operator is particularly useful in various programming scenarios, such as determining if a number is even or odd, cycling through a fixed range of values in loops, or implementing algorithms that require periodic resetting or segmentation based on remainders. It plays a crucial role in many mathematical operations in programming and understanding its function is fundamental to writing effective Java code.