This solution reads a number from the user and divides 100 by it. The key idea is: “Try the risky code, and catch errors instead of crashing.”

What the code is doing

• Scanner input = new Scanner(System.in);
  Creates a tool to read what the user types.

• try { ... }
  Wraps the lines that might fail:

  • Reading an integer with nextInt()

  • Dividing 100 / number

• catch (ArithmeticException e)
  Runs if the user typed 0, because dividing by zero is not allowed.

• catch (InputMismatchException e)
  Runs if the user typed something that isn’t an integer (like "hi").

• input.close();
  Closes the scanner (good cleanup habit).

Why there are two catches

Different problems need different messages:

• Divide by zero → math error (ArithmeticException)

• Not a number → input error (InputMismatchException)

That’s it: same program, but now it’s safe and user-friendly.