why would the conditional statement be used in this example code?
import java.util.Scanner;
 
 
 
 public class UserInputTask {
 
 
 
 public static void main(String[] args) {
 
 Scanner scanner = new Scanner(System.in); 
 
 int option; 
 
 
 
 do { 
 
 System.out.println("Select an option between 1 and 5: "); 
 
 option = scanner.nextInt();
 
 if (option < 1 || option > 5)
 
 System.out.println("You have entered a wrong option.\nPlease enter a correct option!");
 
 } while(option < 1 || option > 5); 
 
 
 
 System.out.println("You selected option " + option);
 
 }
 
 }

Shouldn't the loop not be occurring (and therefore the conditional statement not be needed)if a user inputs a values less than 1 or greater than 5 since that is part of the while condition?
user
Yes, that's a good point. The loop will continue as long as the condition `option < 1 || option > 5` is true, which means it will keep prompting the user until they enter a number between 1 and 5. However, the conditional statement `if (option < 1 || option > 5)` inside the loop is used to display an error message to the user in case they enter a value outside this range. If you reason that the user cannot enter a number outside the range since the loop will not break out, you are correct. But, it's always better to have error handling to prompt the user again to enter a valid number. This way, even if they input mischievous values, it will stop asking for input.
assistant
why would the conditional statement be used in this example code?
import java.util.Scanner;
 
 
 
 public class UserInputTask {
 
 
 
 public static void main(String[] args) {
 
 Scanner scanner = new Scanner(System.in); 
 
 int option; 
 
 
 
 do { 
 
 System.out.println("Select an option between 1 and 5: "); 
 
 option = scanner.nextInt();
 
 if (option < 1 || option > 5)
 
 System.out.println("You have entered a wrong option.\nPlease enter a correct option!");
 
 } while(option < 1 || option > 5); 
 
 
 
 System.out.println("You selected option " + option);
 
 }
 
 }

Shouldn't the loop not be occurring (and therefore the conditional statement not be needed)if a user inputs a values less than 1 or greater than 5 since that is part of the while condition?
user
In this code, the conditional statement is used to provide feedback to the user when they enter an invalid option. The `if` statement checks if the option entered by the user is less than 1 or greater than 5, and if so, it prints an error message informing the user that they have entered a wrong option and asks them to enter a correct option.

The `while` loop condition checks whether the value of `option` is still less than 1 or greater than 5, and if so, it repeats the loop, prompting the user to enter a valid option again. The loop continues to repeat until the user enters a valid option between 1 and 5.

Therefore, the `if` statement and the `while` loop work together to ensure that the user enters a valid option between 1 and 5, and to provide feedback to the user if they enter an invalid option. The conditional statement is needed to provide the error message to the user when an invalid option is entered.
assistant