java Warm up: Variables, input, and casting (Java) Prompt the user to input an i

Question

java

Warm up: Variables, input, and casting (Java)

Prompt the user to input an integer, a double, a character, and a string, storing each into separate variables. Then, output those four values on a single line separated by a space. (Submit for 2 points).

(2) Extend to also output in reverse. (Submit for 1 point, so 3 points total).

(3) Extend to cast the double to an integer, and output that integer. (Submit for 2 points, so 5 points total).

import java.util.Scanner;

public class BasicInput {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
int userInt = 0;
double userDouble = 0.0;
// FIXME Define char and string variables similarly
  
System.out.println("Enter integer: ");
userInt = scnr.nextInt();
  
// FIXME (1): Finish reading other items into variables, then output the four values on a single line separated by a space

// FIXME (2): Output the four values in reverse
  
// FIXME (3): Cast the double to an integer, and output that integer
  
return;
}

}

Answer

import java.util.Scanner;

public class BasicInput {

   public static void main(String[] args) {

      Scanner scnr = new Scanner(System.in);

      int userInt = 0;

      double userDouble = 0.0;

      // FIXME Define char and string variables similarly

    char userChar;

      String userString;

      System.out.print("Enter integer: ");

      userInt = scnr.nextInt();

      System.out.print("Enter double: ");

      userDouble = scnr.nextDouble();

      System.out.print("Enter character: ");

      userChar = scnr.next().charAt(0);

      System.out.print("Enter string: ");

      userString = scnr.next();

      // FIXME (1): Finish reading other items into variables, then output the four values on a single line separated by a space

      System.out.println(userInt + " " + userDouble + " " + userChar + " " + userString);

      // FIXME (2): Output the four values in reverse

      System.out.println(userString + " " + userChar + " " + userDouble + " " + userInt);

      // FIXME (3): Cast the double to an integer, and output that integer

      int temp = (int)userDouble;

      System.out.println(userDouble + " cast to an integer is " + temp);

      return;

   }

}

output from zybooks

Explanation / Answer

BasicInput.java

import java.util.Scanner;

public class BasicInput {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

int userInt = 0;

double userDouble = 0.0;

System.out.print("Enter integer: ");

userInt = scan.nextInt();

System.out.print("Enter double: ");

userDouble = scan.nextDouble();

System.out.print("Enter character: ");

char charValue = scan.next().charAt(0);

System.out.print("Enter string: ");

String stringValue = scan.next();

System.out.println(userInt+" "+userDouble+" "+charValue+" "+stringValue);

System.out.println(stringValue+" "+charValue+" "+userDouble+" "+userInt);

int n = (int)userDouble;

System.out.println(userDouble+" cast to an integer is "+n);

}

}

Output:

Enter integer: 99
Enter double: 3.77
Enter character: z
Enter string: Howdy
99 3.77 z Howdy
Howdy z 3.77 99
3.77 cast to an integer is 3

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