Thread: Loops and conditionals

Hi everybody. First time poster here. I am having trouble with the if/else if statements for my loop. Any feedback is greatly appreciated.

package 
//Import scanner library
import java.util.Scanner;
 
//Begin Class Main
public class Main {
 
    //Begin Main Method
    public static void main(String[] args) {
 
        //Declarations
        //Setting loop count to zero
        int loopresponse = 0;
        int loops = 0;
        //declare a variable of type integer for the switch block. This is the number the factorial will work with.
        int factorial;
        //declare a variable of type integer for the menu
        int answer;
        //declare variable for do loop of type string
        int numberinput;
 
 
        //New Scanner Object sc
        Scanner sc = new Scanner(System.in);
 
        //Welcome message
        System.out.print("Welcome to my factorial program!\nPlease choose from the following:\n"
                + "1. Run program\n2. Exit program\n");
        answer = sc.nextInt();
        System.out.print("This program will determine the factorial value of positive integers. \n"
                + "The starting number is 1. \nPlease enter an ending integer value: \n");
 
        //Output a menu. 1 to Run program, 2 to exit the program")
        //Assign input to the users choice (receive input)
 
        //Begin do loop
        do {
            //Begin switch/case statement blocks
            switch (answer){
                case 1: // declare case 1
                    System.out.println("This program will determine the factorial value of positive integers. \n"
                            + "The starting number is 1. \nPlease enter an ending integer value: \n");
                    numberinput = sc.nextInt(); //scan in number
 
                    for (int n=1; n<= numberinput; n++)
                    {
                        factorial = (n*factorial);
                    }
                    break; //end of case 1
 
                case 2: // declare case 2
                    //Output a statement thanking the user for using program
                    System.out.print("Thank you for using the Utility Calculator!\nGoodbye!\n");
                    //Use the following code to exit program
		    System.exit(0);
                    break;  //End of case 2
 
                default: //Declare default case to catch mistakes
                    //Use the following code to exit program
		    System.exit(0);
                    break;
            } //end switch/case block
 
            System.out.print("Run factorial program again? (Y for Yes, N for No)\n");
            loopresponse = sc.nextInt(); //Receive output as string declared above used in do loop
 
        //End do loop with question. Use code below
        if (loopresponse.equalsIgnoreCase("y")) { //yes
 
        } else if (loopresponse.equalsIgnoreCase "n") { //no
        int loopresponse = 2;
        }
}//End do loop
 
 
 
    } //End Main Method
 
}//End Class

What is the problem?

In your codes, your 'while' statement is missing.. that makes an error because a do loop must be paired with a while statement at the bottom... supplying the while statement you can control the loop using your if/else.