One of the numbers is so huge that it cannot be stored in any data type
8/18/2019 2:08:01 PM
One option is to take one digit at a time from both numbers and subtracting then with the borrow.
Look here for addition examples:
Use array of chars to store your large numbers then starting from right to left, char by char perform basic school addition or subtraction, taking care of carry or borrow
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