While Loop String check

Question

I cant get out of this loop when i enter M or F

while(!optionGender.equals("M") || !optionGender.equals("F")){
            System.out.println("Not an option, please try again");
            optionGender = promptUser.nextLine();
            optionGender = optionGender.toUpperCase();

        }

The conditions inside while are opposite to each other, So no matter what input you give one condition will be set to true. As mentioned in the above comment by @4castle || should be replaced by && — Sumit S Chawla
– Sumit S Chawla, Commented Nov 18, 2017 at 16:55

Kaustubh Khare · Accepted Answer · 2017-11-18 16:55:24Z

2

Change your condition || by &&,

while(!optionGender.equals("M") && !optionGender.equals("F")){
                System.out.println("Not an option, please try again");
                optionGender = promptUser.nextLine();
                optionGender = optionGender.toUpperCase();
   }

answered Nov 18, 2017 at 16:55

Kaustubh Khare

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2 Comments

Kaustubh Khare Over a year ago

@DanielChen are you using m or f instead of M or F.

Kaustubh Khare Over a year ago

@DanielChen better to use equalsIgnoreCase instead of equals. It will check for M as well as m.

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