Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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help create a Java recursive method that determines if a number is a prime number

**Do the following:**

Create a recursive method `computePrime(int x, int y)` that returns a boolean value. The method should:

- Return true if `x` is a prime number; otherwise, return false.
- `y` is the current divisor to check.

Prompt the user to enter a number to check if it is prime.

Make the first call from the main function, setting `y` equal to 2. Example: `primeno = computePrime(number, 2);`

**Base cases:**

- If `x < 2`, return false.
- If `x == 2`, return true.
- If `x % y == 0`, return false.
- If `y * y > x`, return true.
- Otherwise, check for the next divisor:
  - `return computePrime(x, y + 1)`

Demonstrate the method in a program (either in the same program or a separate one).

Test the program to ensure it runs correctly.
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Transcribed Image Text:**Do the following:** Create a recursive method `computePrime(int x, int y)` that returns a boolean value. The method should: - Return true if `x` is a prime number; otherwise, return false. - `y` is the current divisor to check. Prompt the user to enter a number to check if it is prime. Make the first call from the main function, setting `y` equal to 2. Example: `primeno = computePrime(number, 2);` **Base cases:** - If `x < 2`, return false. - If `x == 2`, return true. - If `x % y == 0`, return false. - If `y * y > x`, return true. - Otherwise, check for the next divisor: - `return computePrime(x, y + 1)` Demonstrate the method in a program (either in the same program or a separate one). Test the program to ensure it runs correctly.
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