Java: Print a floating-point number in a specified format
Java Conditional Statement: Exercise-4 with Solution
Write a Java program that reads a floating-point number and prints "zero" if the number is zero. Otherwise, print "positive" or "negative". Add "small" if the absolute value of the number is less than 1, or "large" if it exceeds 1,000,000.
Test Data
Input value: 25
Pictorial Presentation:

Sample Solution:
Java Code:
import java.util.Scanner;
public class Exercise4 {
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
System.out.print("Input value: ");
double input = in.nextDouble();
if (input > 0)
{
if (input < 1)
{
System.out.println("Positive small number");
}
else if (input > 1000000)
{
System.out.println("Positive large number");
}
else
{
System.out.println("Positive number");
}
}
else if (input < 0)
{
if (Math.abs(input) < 1)
{
System.out.println("Negative small number");
}
else if (Math.abs(input) > 1000000)
{
System.out.println("Negative large number");
}
else
{
System.out.println("Negative number");
}
}
else
{
System.out.println("Zero");
}
}
}
Sample Output:
Input value: 25 Positive number
Flowchart:

Java Code Editor:
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Java: Tips of the Day
IsPowerOfTwo
Checks if a value is positive power of two.
To understand how it works let's assume we made a call IsPowerOfTwo(4).
As value is greater than 0, so right side of the && operator will be evaluated.
The result of (~value + 1) is equal to value itself. ~100 + 001 => 011 + 001 => 100. This is equal to value.
The result of (value & value) is value. 100 & 100 => 100.
This will value the expression to true as value is equal to value.
public static boolean isPowerOfTwo(final int value) { return value > 0 && ((value & (~value + 1)) == value); }
Ref: https://bit.ly/3sA5d4I
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