Question

Modify the program to include two-character .com names where the second character can be a letter or a number, as in a2.com. Hint: Add a second loop, following the while (letter2 <= 'z') loop, to handle numbers.
import java.util.Scanner;
public class DomainNamePrinter {
public static void main (String [] args) {
Scanner scnr = new Scanner(System.in);
char letter1 = '?';
char letter2 = '?';
System.out.println("Two-letter domain names:");
letter1 = 'a';
while (letter1 <= 'z') {
letter2 = 'a';
while (letter2 <= 'z') {
System.out.println("" + letter1 +
"" + letter2 + ".com");
++letter2;
}
++letter1;
}
return;
}
}

Answer 1

Answer:

add the following loop before or after the while (letter2 <= 'z') loop.

letter2 = '0';

while(letter2 <= '9' && letter2 >='0'){

System.out.println("" + letter1 + "" + letter2 + ".com");

++letter2;

}

Explanation:

Bold formatted statement in following code is added to handle numbers:

import java.util.Scanner;

public class DomainNamePrinter {

public static void main (String [] args) {

Scanner scnr = new Scanner(System.in);

char letter1 = '?';

char letter2 = '?';

System.out.println("Two-letter domain names:");

letter1 = 'a';

while (letter1 <= 'z') {

letter2 = 'a';

while (letter2 <= 'z') {

System.out.println("" + letter1 + "" + letter2 + ".com");

++letter2;

}

letter2 = '0';

while(letter2 <= '9' && letter2 >='0'){

System.out.println("" + letter1 + "" + letter2 + ".com");

++letter2;

}

++letter1;

}

return;

}

}