mathOperation4.java

// utility imports...
class mathOperation4 {
 public static void main(String[] args) {
 // Scanner object...
 Scanner input = new Scanner(System.in);
 // Taking input..
 System.out.print("Enter a number: );
 // input section...
 double a = input.nextDouble(); // inputs can either be decimal or floating number..
 // math operation to verify the absolute number...
 double absValue = (double) (Math.abs(a));
 // Displaying output...
 System.out.println("Absolute value is: " +absValue);

 input.close(); // if doesn't,, resoource will be leaked...
 }
}