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User-Input Validation

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kalyansg

User-Input Validation

Hello,

I have written a simple code for User-Input-Validation. It seems to work. But for a wrong string input there is the error 4 (Undefined variable:).

Q1. Can this error be hidden?

Q2. Kindly let me know if I should use a better validation code.

Thanks for your help

Kalyan

CODE:

clear
clc
month = 0;

while (month<1 | month>6)

month = input('Please chose your option between 1 and 6: '); if (type(month)==10) then month=0;end;//10 - represent string

end

select month
case 1
disp("Month is January")
case 2
disp("Month is February")
case 3
disp("Month is March")
case 4
disp("Month is April")
case 5
disp("Month is May")
case 6
disp("Month is June")
else
disp("Wrong Month number")

end

disp(month)

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kalyansg

Re: User-Input Validation

I think a better code would be:

clear
clc
month = 0;

while (month<1 | month>6)

month = input('Please chose your option between 1 and 6: ', "string")
month=strtod(month)
if (isnan(month)) then month = 0;end
end

select month
case 1
disp("Month is January")
case 2
disp("Month is February")
case 3
disp("Month is March")
case 4
disp("Month is April")
case 5
disp("Month is May")
case 6
disp("Month is June")
else
disp("Wrong Month number")

end

disp(month)

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