MATLAB: How to test for palindrome of the product of unknown digit numbers

for looppalindromeproduct of combination

when testing out palindromic numbers for three digit numbers , we could create the products of the three digits this way:
 for i=999:-1:100
    for j=999:-1:100
    answer = i*j;
what if we do not know the number of digit and the number of digit will be the input to the code , how can i adjust the 'for loop' to cater for the unknown number of digits?
say input could be 2 digits or 4 digits or 5 digits and the code will create the products
thanks

Best Answer

for j = 10^(number_of_digits) - 1 : -1 : 10^(number_of_digits-1)
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