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Inputting a string into my code that an int is required and I get a java error how can I fix this?

When I input a string into the code below by mistake as a test, I get a red java error message in my console. However, within my if statement I added an else part which should end the program if the user doesn’t input the if statement condition i.e a number between 0-100. Why this is and how can I fix it?

        Scanner input = new Scanner(;
        System.out.println("Enter a number: ");
        int decimal = input.nextInt();
        if (decimal > 0 && decimal <= 100) {
        else {



The nextInt method throws an exception if the input is not an integer. If you want to prevent this, just use the method hasNextInt to check before read it.