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Java program to round off an integer number to the next lower multiple of 2

Given/input a number, we have to round off the number to the next lower multiple of 2.
Submitted by Nidhi, on March 11, 2022

Problem Solution:

In this program, we will read an integer number from the user. Then we will find the next lower multiple of 2 and print the result.

Program/Source Code:

The source code to round off an integer number to the next lower multiple of 2 is given below. The given program is compiled and executed successfully.

// Java program to round off an integer number to 
// the next lower multiple of 2

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner SC = new Scanner(System.in);

    int tmp = 1;
    int num = 0;
    int i = 0;

    System.out.printf("Enter Number: ");
    num = SC.nextInt();

    if (num > 0) {
      for (; tmp <= num >> 1;)
        tmp = tmp << 1;
      num = tmp;
    } else {
      num = ~num;
      num = num + 1;

      for (; tmp <= num >> 1;)
        tmp = tmp << 1;

      tmp = tmp << 1;
      tmp = ~tmp;
      tmp = tmp + 1;
      num = tmp;
    }
    System.out.printf("Result is: %d\n", num);
  }
}

Output:

Enter Number: 35
Result is: 32

Explanation:

In the above program, we imported the java.util.Scanner package to read the variable's value from the user. And, created a public class Main. It contains a static method main().

The main() method is an entry point for the program. Here, we read an integer number from the user and found the next lower multiple of 2 using bitwise shifting operators and printed the result.

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