How To Banking Concern Agree If Integer Release Is Ability Of 2 Inwards Coffee - Iii Examples
How to depository fiscal establishment tally if an integer publish is a ability of 2 inwards Java is i of the pop programming interview question as well as has been asked inwards many interviews. Surprisingly, this occupation which looks uncomplicated plenty to answer, doesn't plough out that uncomplicated if for many developers. Many Java programmers, both freshers as well as less experienced, struggle to write code for a function, which tin give the sack depository fiscal establishment tally if publish is ability of 2 or not. There could travel many dissimilar reasons for that, only it’s expected to at to the lowest degree come upwardly up amongst beast strength solution. For those who are familiar amongst bitwise operators inwards Java , how positive as well as negative numbers are represented inwards binary format, this practice is quite easy. Since negative numbers are represented every bit 2's complement value inwards Java, you lot tin give the sack easily detect if whatsoever publish is ability of 2 or non past times looking at its flake pattern. Remember checking for ability of 2 is dissimilar than checking if publish is fifty-fifty or odd, that’s closed to other matter to note. Influenza A virus subtype H5N1 publish tin give the sack travel even, only it’s non necessary to travel a ability of two, e.g. vi is fifty-fifty only it’s non a ability of two.
3 ways to depository fiscal establishment tally if publish is ability of 2 or not
In this article nosotros volition run across 3 uncomplicated examples to depository fiscal establishment tally if whatsoever integer publish is ability of 2 or not. We accept 3 methods, which uses bitwise operator, beast strength agency as well as flake shit operators to solve this problem. Method which uses bitwise operators tin give the sack non depository fiscal establishment tally if nada is ability of 2 or not, as well as exclusively piece of work for integer publish which is greater than or equal to 1. hither are code lawsuit of 3 uncomplicated method to detect out if a publish is ability of 2 or non : public bird PowerOf2Test {
public static void main(String args[]) {
int[] numbers = {0,1,2,6,8};
for(int num: numbers){
System.out.println("isPowerOfTwo()-- is " + num + " ability of 2 inwards Java :" + isPowerOfTwo(num));
System.out.println("powerOfTwo()-- is " + num + " ability of 2 inwards Java :" + powerOfTwo(num));
System.out.println("checkPowerOfTwo()-- is " + num + " ability of 2 inwards Java :" + checkPowerOfTwo(num));
System.out.println("-----------------------------------------------------------");
}
}
/*
* checking if publish is ability of 2 using flake shift operator inwards java
* e.g. four inwards binary format is "0000 0000 0000 0000 0000 0000 0000 0100";
* as well as -4 is "1111 1111 1111 1111 1111 1111 1111 1100";
* as well as 4&-4 volition be "0000 0000 0000 0000 0000 0000 0000 0100"
*/
private static boolean isPowerOfTwo(int number) {
if(number <0){
throw new IllegalArgumentException("number: " + number);
}
if ((number & -number) == number) {
return true;
}
return false;
}
/*
* checking if publish is ability of 2 using beast force
* starts amongst 1, multiplying amongst 2 it volition eventually travel same every bit master copy number
*/
private static boolean powerOfTwo(int number){
int foursquare = 1;
while(number >= square){
if(number == square){
return true;
}
square = square*2;
}
return false;
}
/*
* detect if an integer publish is ability of 2 or non using flake shift operator
*/
private static boolean checkPowerOfTwo(int number){
if(number <0){
throw new IllegalArgumentException("number: " + number);
}
return ((number & (number -1)) == 0);
}
}
Output:
isPowerOfTwo()-- is 0 ability of 2 inwards Java :true
powerOfTwo()-- is 0 ability of 2 inwards Java :false
checkPowerOfTwo()-- is 0 ability of 2 inwards Java :true
-----------------------------------------------------------
isPowerOfTwo()-- is 1 ability of 2 inwards Java :true
powerOfTwo()-- is 1 ability of 2 inwards Java :true
checkPowerOfTwo()-- is 1 ability of 2 inwards Java :true
-----------------------------------------------------------
isPowerOfTwo()-- is 2 ability of 2 inwards Java :true
powerOfTwo()-- is 2 ability of 2 inwards Java :true
checkPowerOfTwo()-- is 2 ability of 2 inwards Java :true
-----------------------------------------------------------
isPowerOfTwo()-- is 6 ability of 2 inwards Java :false
powerOfTwo()-- is 6 ability of 2 inwards Java :false
checkPowerOfTwo()-- is 6 ability of 2 inwards Java :false
-----------------------------------------------------------
isPowerOfTwo()-- is 8 ability of 2 inwards Java :true
powerOfTwo()-- is 8 ability of 2 inwards Java :true
checkPowerOfTwo()-- is 8 ability of 2 inwards Java :true
-----------------------------------------------------------
That’s all on this article nearly checking if a publish I ability of 2 or not. Let us know if you lot detect closed to other agency to verify if publish is ability of two.
Further Learning
The Coding Interview Bootcamp: Algorithms + Data Structures
Data Structures as well as Algorithms: Deep Dive Using Java
How to depository fiscal establishment tally if linked listing contains loop or not
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