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How do i end a loop using a different character like "x" or so [closed]

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I have this code which is a minigame, you type a number and if is divisible by 5 you get a "Fizz" / if divisible by 3 you get a "Buzz" / and if divisible by both, you get a "FizzBuzz".
Now, i need help to end the "while(true)" loop, peacefully with a mesage like... "goodbye" whenever you enter the letter "X".
I would apreciate if you can add the aswer to the full code and a little explain of the code.
public class CLass {
public static void main(String[] args) {
int number;
Scanner scan = new Scanner(System.in);
while (true) {
System.out.print("number: ");
number = scan.nextInt();
if (number % 5 == 0 && number % 3 == 0)
System.out.println("FizzBuzz");
else if (number % 5 == 0)
System.out.println("Fizz");
else if (number % 3 == 0)
System.out.println("Buzz");
else
System.out.println(number);
}
}
}

You can do something like:
final Scanner scan = new Scanner(System.in);
String input;
do {
input = scan.next();
if(!Objects.equals(input, "x")){
System.out.println("your input is: " + input);
...
}
} while(!Objects.equals(input, "x"));
System.out.println("Goodbye");
And if you need to convert the string into int, take a look on some solutions here:
How to check if a String is numeric in Java

While statement isn't excuting inside if statement? [closed]

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I am trying to make it print out a range of specified numbers. So if they select option 1 and put in 1 and 15, I want it to print out 1 to 15. Once it gets to the while statement though it just prints nothing.
import java.util.Scanner;
public class Lab4 {
public static void main(String[] args) {
Scanner in = new Scanner (System.in);
System.out.print("Please choose your choice from the following menu");
System.out.print("\n1) Print through all integer numbers between two given integers");
System.out.print("\n2) Display a right triangular pattern of stars");
System.out.println("\n3) Quit");
int userInput = in.nextInt();
if (userInput == 1) {
System.out.print("Enter the start number: ");
int firstInteger = in.nextInt();
System.out.print("Enter the second number: ");
int secondInteger = in.nextInt();
while (firstInteger < secondInteger);
System.out.print(firstInteger);
firstInteger++;
} else if (userInput == 2) {
System.out.print("Enter the height: ");
int triangleHeight = in.nextInt();
} else if (userInput == 3);{
System.exit(userInput);
}
in.close();
}
}

You should change :
while (firstInteger < secondInteger);
System.out.print(firstInteger);
firstInteger++;
to
while (firstInteger < secondInteger) {
System.out.print(firstInteger);
firstInteger++;
}

while (firstInteger < secondInteger);
This will be treated as two executable lines of instructions,
which is similar like
while (firstInteger < secondInteger)
;
Try to remove the ; after while statement

Can do-while loops only run with boolean variables? Java [closed]

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I am having some trouble with this small segment. Can do-while loops only run using boolean variables? I am trying to ask the "user" to enter "0" or "1" so that the program will either loop or end.
Error message:
Chapter4Practice.java:23: error: incompatible types: int cannot be
converted to boolean
} while (choice = 1);
^ 1 error
My code:
import java.util.Scanner;
public class Chapter4Practice
{
public static void main(String[] args)
{
int choice, num1, num2;
String input;
Scanner sc = new Scanner(System.in);
do {
System.out.print("Enter a number: ");
num1 = sc.nextInt();
System.out.print("Enter another number: ");
num2 = sc.nextInt();
System.out.println("The sum is " + (num1 + num2));
System.out.println("Do you want to do this again?");
System.out.println("(1 = yes, 0 = no)");
sc.nextLine();
choice = sc.nextInt();
} while (choice = 1);
} //End Main
} //End Class

Short answer: Yes, you can have simple or complex statements inside your do-while but at the end it will have to evaluate to either true or false
Also your statement should be == ( single = means assign, where == is evaluate)

need to determine the positive, negative and zero numbers in program and add all the positive and negative numbers separately [closed]

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I need to determine the positive, negative and zero numbers in a program and add all the positive and negative numbers separately. I'm using while loop (can use do-while) because for loop and array is not allowed. Badly need your help. Here's my code. The code should allow entering 10 numbers before determining.
public class Mix22 {
public static void main(String[] args) {
Scanner ety = new Scanner(System.in);
int count=0;
int positive=0;
int negative =0;
int num=0;
System.out.println("Enter a number: ");
num = ety.nextInt();
while(num!=10){
if(num<0)
negative++;
if (num>0)
positive++;
System.out.println("Enter a number: ");
num = ety.nextInt();
}
System.out.println("Negative numbers in the program: " + negative);
System.out.println("Positive numbers in the program: " + positive);
}
}

Is the problem that you want to run the loop 10 times? You've got a count variable that you are not otherwise using. The loop should look something like:
int count=0;
while (count != 10) {
...
++count;
}
Conventionally a for loop is used for this (if allowed):
for (int count=0; count<10; ++count) {
...
}

How could I add a while loop into my code when there's already if statements [closed]

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Have seen other posts, but I don't know when to enter the while loop or for loop for my program run until it meets conditions, which is enter a number between 1 and 20 and the run the code.
import java.util.Scanner;
public class MultiplicationTable {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int number, total;
System.out.println("Please enter an integer from 1 to 20:");
number = scanner.nextInt();
if (number >= 21){
System.out.println("Your integer must be between 1 and 20.");
}
else if ( number <= 0){
System.out.println("Your integer must be between 1 and 20.");
}
else {
for(int i = 1; i<=20; i++){
total = number * i;
System.out.println(i + " X " + number + " = " + total);
}
}
}
}

Put a while loop around the scanner input
while(number < 0 || number > 20)
{
number = scanner.nextInt();
// if statements here
}
With this, you will need to initialize number so that you get into the loop
int number = -1;