Power of Two

Easy
46
86.1% Acceptance

In this lab, you will create a Java method named isPowerOfTwo. This method will check if a given integer is a power of two and return a boolean value as the output.

Objectives

  • Write a method public static boolean isPowerOfTwo(int number) in the Main class.
  • The method should return true if the provided integer is a power of two, and false otherwise.

Considerations

  • A number is a power of two if it can be written as 2^n where n is an integer.
  • Remember to handle edge cases. For example, 1 (2^0) is a power of two, but 0 and negative numbers are not.

Examples

  1. isPowerOfTwo(1) should return true as 1 is 2 raised to the power of 0.
  2. isPowerOfTwo(5) should return false as 5 cannot be expressed as 2 raised to an integer.

Tips

  • Consider the properties of powers of two in binary representation to simplify your logic.
  • Don't forget to test your method with different inputs, including edge cases like 0, 1, and negative numbers.

Challenges

Challenge 1: Validate the Correct Method Name and the Method Return Type

  • Objective: Confirm that you have declared a method named isPowerOfTwo that takes an integer as its parameter and returns a boolean value.
  • Hint: Ensure your method is public, named exactly as isPowerOfTwo, and has the signature public static boolean isPowerOfTwo(int number).

Challenge 2: A Power of Two Returns True

  • Objective: Write the isPowerOfTwo method such that it returns true when passed a number that is a power of two.
  • Hint: Test your method with inputs like 2, 4, 8, 16, etc., to ensure it correctly identifies these as powers of two.

Challenge 3: A Different Power of Two Returns True

  • Objective: Ensure your method consistently returns true for different powers of two.
  • Hint: Validate your method with various powers of two, like 32, 64, or 128, to confirm consistent behavior.

Challenge 4: A Non-Power of Two Integer Returns False

  • Objective: Your method should correctly return false for integers that are not powers of two.
  • Hint: Try inputs such as 3, 6, 7, 9, etc., and check if your method accurately returns false.

By the end of this lab, you should have a robust method that accurately determines whether an integer is a power of two. Happy coding!