Java/Maths/PowerOfTwoOrNot.java at master · primary-code-test/Java · GitHub

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package Maths;

/** A utility to check if a given number is power of two or not. For example 8,16 etc. */

public class PowerOfTwoOrNot {

public static void main(String[] args) {

assert !checkIfPowerOfTwoOrNot(0);

assert checkIfPowerOfTwoOrNot(1);

assert checkIfPowerOfTwoOrNot(8);

assert checkIfPowerOfTwoOrNot(16);

assert checkIfPowerOfTwoOrNot(1024);

}

/**

* Checks whether given number is power of two or not.

* @param number the number to check

* @return {@code true} if given number is power of two, otherwise {@code false}

public static boolean checkIfPowerOfTwoOrNot(int number) {

return number != 0 && ((number & (number - 1)) == 0);

}