Multiple condition C#

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I’m trying to validate if a user is a teacher and if they type "s" or "n" uppercase or lowercase but this getting caught in the loop with the condition being true or false.

while ((array [i, 1] != "S") || (array [i, 1] != "s") || (array [i, 1] != "n") || (array [i, 1] != "N"))

c#

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Paul, try to change the operator Or (||) to And (&&). As you are comparing the same element with more than one value, it will surely always be different from at least one of them.

I hope it helps

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