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username123

Mon Nov 16, 2015 5:52 pm


While loop repeats even if conditions are met

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What the title says. Here's my code:

System.out.println("Enter your payment method (supported: Visa, Mastercard, Paypal, cash");
        String payment = input.next();
        do
        {
          System.out.println("Invalid payment method.");
          System.out.println("Enter your payment method (supported: Visa, Mastercard, Paypal, cash");
          payment = input.next();
        } while(!payment.equals("visa")||!payment.equals("Visa")||!payment.equals("mastercard")||!payment.equals("Mastercard")||!payment.equals("paypal")||!payment.equals("Paypal")||!payment.equals("cash")||!payment.equals("Cash"));


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Zren

Mon Nov 16, 2015 7:31 pm


RE:While loop repeats even if conditions are met

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Use payment.equalsIgnoreCase("visa") instead of doing 2^(lengthOfString) comparisions to check all possibilities.

do {} while(); loops will always run once. It will not check the exit condition until the end of the first iteration.