How will the program behave if error handling and exception situations are not implemented in it?

If error and exception handling (try-catch blocks) are not implemented in a Java program, then when an exception occurs, the program will terminate and throw the exception up the call stack.

If the exception is not caught anywhere, the JVM will terminate the program and display a stack trace with error information.

For example, dividing by zero without handling:

public class Main {
    public static void main(String[] args) {
        int a = 10 / 0; // ArithmeticException
        System.out.println("This code will not execute");
    }
}

As a result, the program will crash with an ArithmeticException error, and subsequent code will not execute.

Therefore, exception handling is important for error control, the possibility of correct operation termination, and user notification.