MATLAB: About palindrome number check

palindrome

%i have number n and i want to check whether that is palindrome
%but the n is too big so i cant use this code,what should i do
%example n= 1.76536927729736e+16
%my code is
if n==str2num(flip(num2str(n)))
    flag=true
else
    flag=false
end

Best Answer

For numbers up to 2^53 the type double represents the digits exactly. This is 9-0e15. See flintmax.
Your example n=1.76536927729736e+16 exceed this limit. Therefore doubles are not useful fpr your needs. You cannot even store the value exactly in a double. Maybe you need an UINT8 vector containing the digits, or a CHAR vector.
It does not matter, if the value is displayed in the e notation or not, because this can be controlled by the command: format
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