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  1. /**
  2.  *
  3.  * @author Damien Bell <SkyeShatter@gmail.com>
  4.  */
  5. import java.lang.Math;
  6. import java.util.Scanner;
  7. class Jtutorial1 {
  8.     public static void main(String args[]){
  9.      Scanner input = new Scanner(System.in);
  10.         // Declare a double, run some tests on it.
  11.         // Is it even or odd?  Is it a perfect square?   Is it a whole number?
  12.         // Is the number squared even?  
  13.  
  14.         //<, <=, >, >=, || ,  &&,  !=
  15.  
  16.  
  17.         double choice=0;
  18.         boolean isEven=false, isPS=false, isWhole=false, isSquaredEven=false;
  19.  
  20.  
  21.         System.out.println("Enter a value for the variable: ");
  22.         choice = input.nextDouble();
  23.  
  24.         //even
  25.         if((choice%2) < 1){
  26.             isEven=true;
  27.             //System.out.println("The number " + choice + " is even prior to the decimal point. ");
  28.         }
  29.         else{
  30.             isEven=false;
  31.             //System.out.println("The number " + choice + " is NOT even. ");
  32.         }
  33.  
  34.         //perfect square
  35.         if(((Math.sqrt(choice))%1) == 0){//sqrt(9) == 3
  36.             isPS=true; 
  37.             //System.out.println("The number " + choice + "  is a perfect square: " + Math.sqrt(choice));
  38.         }
  39.         else{
  40.             isPS=false;
  41.             //System.out.println("The number " + choice + " is NOT a perfect square: " + Math.sqrt(choice));
  42.         }
  43.  
  44.         if ((choice%1) == 0){
  45.             isWhole=true;
  46.             //System.out.println("The number " + choice + " is a whole number: ");
  47.         }
  48.         else {
  49.             isWhole=false;
  50.              //System.out.println("The number " + choice + " is NOT a whole number: ");
  51.         }
  52.  
  53.         if((((Math.pow(choice, 2)))%2) == 0){
  54.             isSquaredEven=true;
  55.             //System.out.println("The number " + choice + " squared is even: "+ Math.pow(choice, 2));
  56.         }
  57.         else{
  58.             isSquaredEven=false;
  59.              //System.out.println("The number " + choice + " squared is NOT even: " + Math.pow(choice, 2));
  60.         }
  61.  
  62.         if(isEven){
  63.             System.out.println("The number is even. ");
  64.         }
  65.         if(isPS){
  66.             System.out.println("The number is a perfect square. ");
  67.         }
  68.         if(isWhole){
  69.             System.out.println("The number is whole. ");
  70.         }
  71.         if(isSquaredEven){
  72.             System.out.println("The number sqared is even. ");
  73.         }        
  74.  
  75.  
  76.  
  77.  
  78.     } //End main
  79. } //End class
  80.  
Success #stdin #stdout 0.08s 213440KB
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Enter a value for the variable: 
The number is even. 
The number is a perfect square. 
The number is whole. 
The number sqared is even.
https://ideone.com/ZNvEc
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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