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While loop to get correct user input

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david wojtowicz
david wojtowicz on 27 Nov 2020
Edited: Sulaymon Eshkabilov on 27 Nov 2020
I need to get the correct input from the user, when the user enters the wrong input, it display an error for the while material line. Not sure what im doing wrong here.
material = input('Please enter Uranium, Vanadium, Zinc, or Zirconium: ', 's');
while material ~= 'Uranium' && material ~= 'uranium' && material ~= 'Vanadium' && material ~= 'vanadium' && material ~= 'Zinc' && material ~= 'zinc' && material ~= 'Zirconium' && material ~= 'zirconium'
material = input('ERROR! Please enter Uranium, Vanadium, Zinc, or Zirconium: ', 's');
end

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Answers (1)

Sulaymon Eshkabilov
Sulaymon Eshkabilov on 27 Nov 2020
Edited: Sulaymon Eshkabilov on 27 Nov 2020
Use this string comparison command instead of simple comparison in your IF condition: strncmpi(material, 'uran', 4) || strncmpi(material, 'Uran', 4) || strncmpi(material, 'Zinc', 4) ....

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