how to prompt user to try again instead of letting MATLAB display "Index in position 1 exceeds array bounds" error message.

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Mohammed Mustafa
Mohammed Mustafa 2021-7-24
评论： Mohammed Mustafa 2021-7-24
hello, I am trying to index an element from an array say
a= [1 2 3;
4 5 6;
7 8 9];
position = input ('input a number: ')
element=a(postion,:)
if the user enters a value bigger than the size of array 'a' MATLAB prints the following:
"Index in position 1 exceeds array bounds" and stops.
my question is how do I print ("enter a valid input") and prompt the user to try again.
Thanks.

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采纳的回答

Ive J
Ive J 2021-7-24
a= [1 2 3;
4 5 6;
7 8 9];
askAgain = true;
while askAgain
position = input ('input a number: ');
if position > size(a, 1)
disp('wrong choice, try again!')
else
askAgain = false;
end
end
element=a(postion,:)

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