How do you check if a number is the power of 2?

How do you check if a number is the power of 2?

Keep dividing the number by two, i.e, do n = n/2 iteratively until n becomes 1. In any iteration, if n%2 becomes non-zero and n is not 1 then n is not a power of 2. If n becomes 1 then it is a power of 2.

How do you do to the power of 2 in Java?

The power function in Java is Math….PowerFunc2. java:

1. public class PowerFunc2 {
2. public static void main(String[] args)
3. {
4. double a = 5;
5. double b = -3;
6. System. out. println(Math. pow(a, b)); // return a^b i.e. 5^(-3)
7. }
8. }

How do you show powers in Java?

The java. lang. Math. pow() is used to calculate a number raise to the power of some other number.

1. If the second parameter is positive or negative zero then the result will be 1.0.
2. If the second parameter is 1.0 then the result will be same as that of the first parameter.

Is number a power of 2?

A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent….Powers of two whose exponents are powers of two.

n	2n	22n (sequence A001146 in the OEIS)
0	1	2
1	2	4
2	4	16
3	8	256

How do you find the next power of 2?

next = pow(2, ceil(log(x)/log(2))); This works by finding the number you’d have raise 2 by to get x (take the log of the number, and divide by the log of the desired base, see wikipedia for more). Then round that up with ceil to get the nearest whole number power.

How do I scan a double in Java?

Example 4

1. import java.util.*;
2. public class ScannerNextDoubleExample4 {
3. public static void main(String args[]){
4. double value;
5. Scanner scan = new Scanner(System.in);
6. System.out.print(“Enter the numeric value : “);
7. value = scan.nextDouble();
8. System.out.println(“Double value : ” + value +” \nTwice value : ” + 2.0*value );

How do you do Squared in Java?

Squaring a number in Java can be accomplished in two ways. One is by multiplying the number by itself. The other is by using the Math. pow() function, which takes two parameters: the number being modified and the power by which you’re raising it.

How do you type to the power of 2?

Typing the keyboard shortcut using the number keys above the letters (outside the number pad) will not work – you must use the number pad on the right side of the keyboard. So the keyboard shortcut for the squared symbol is Alt + 0178. The result is like this: ².

How do you use Bitwise to find the power of 2?

If (x & (x-1)) is zero then the number is power of 2. For example, let x be 8 ( 1000 in binary); then x-1 = 7 ( 0111 ). for example 8 is equivalent to 0x1000, substracting 1 from this, we get 0x0111.