Question

/* Return true if the given non-negative number is a multiple of 3 or 5, but

* not both.
*/
public boolean old35(int n) {
return (n % 3 == 0) != (n % 5 == 0);
}

Answer 1

The code then uses the logical operator '!=' to check if one condition is true and the other is false. If one condition is true and the other is false, the method returns true, indicating that the number is a multiple of 3 or 5 but not both

Step-by-step explanation:

The student's question pertains to a function within a computer program that determines if a given non-negative number is a multiple of 3 or 5, but not both. The code provided appears to be a Java function called old35 that returns a boolean value.

The operation within this function uses the modulo operator '%' to check the remainders when n is divided by 3 and by 5. If n is divisible by either, but not by both, the function returns true; otherwise, it returns false. The given code is a Java method that determines whether a non-negative number is a multiple of 3 or 5, but not both.

To solve this problem, the code uses the modulus operator (%), which calculates the remainder of the division between two numbers. If the remainder of dividing the number by 3 is zero (n % 3 == 0), it indicates that the number is divisible by 3. Similarly, if the remainder of dividing the number by 5 is zero (n % 5 == 0), it indicates that the number is divisible by 5.

The code then uses the logical operator '!=' to check if one condition is true and the other is false. If one condition is true and the other is false, the method returns true, indicating that the number is a multiple of 3 or 5 but not both.