While loop to get correct user input

2020 11 27
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更新时间：2020 11 27
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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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回答（1 个）

Sulaymon Eshkabilov
Sulaymon Eshkabilov 2020-11-27
编辑：Sulaymon Eshkabilov 2020-11-27

0 个投票

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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