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copied!<p>Well, If I don't missunderstanding your questions, you want validate if the user only input r and c for customer type.</p> <p>So, just add another condition in your if statement.</p> <p>Try this :</p> <pre><code>public static void main(String[] args) { Scanner sc = new Scanner(System.in); String choice = "y"; while (!choice.equalsIgnoreCase("n")) { // get the input from the user System.out.print("Enter customer type (r/c): "); String customerType = sc.next(); // VALIDATE ONLY R and C customer type. if (!customerType.equalsIgnoreCase("R") && !customerType.equalsIgnoreCase("C")) { sc.nextLine(); System.out.println("Error! Invalid Customer Type. Try Again "); continue; } else { System.out.print("Enter subtotal: "); double subtotal = sc.nextDouble(); // get the discount percent double discountPercent = 0; if (customerType.equalsIgnoreCase("R")) { if (subtotal < 100) discountPercent = 0; else if (subtotal >= 100 && subtotal < 250) discountPercent = .1; else if (subtotal >= 250) discountPercent = .2; } else if (customerType.equalsIgnoreCase("C")) { if (subtotal < 250) discountPercent = .2; else discountPercent = .3; } //else //{sc.nextLine(); //System.out.println("Error! Invalid Customer Type. Try Again "); //continue; //} //else} // { // discountPercent = .1; // } // calculate the discount amount and total double discountAmount = subtotal * discountPercent; double total = subtotal - discountAmount; // format and display the results NumberFormat currency = NumberFormat.getCurrencyInstance(); NumberFormat percent = NumberFormat.getPercentInstance(); System.out.println( "Discount percent: " + percent.format(discountPercent) + "\n" + "Discount amount: " + currency.format(discountAmount) + "\n" + "Total: " + currency.format(total) + "\n"); // see if the user wants to continue System.out.print("Continue? (y/n): "); choice = sc.next(); System.out.println(); } } } </code></pre>

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