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

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.

Answer 1

[Ive J]

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,:)

[Mohammed Mustafa]

Thank you!