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Exercise

Edge case: Digits of a number

A common programming exercise involves taking the digits of an integer and rearranging them in some way. The fastest way to get the last digit of an integer is to use modulo 10 (% 10). This returns the remainder when dividing the integer by 10.

Here is a method that returns the last digit of an integer. The method fails for exactly half of all possible inputs, negative numbers. This is because modulo 10 preserves the integer's sign.

Input an integer value that causes the lastDigit() method to return an incorrect value.

Instructions

100 XP
  • Write a multi-digit integer whose last digit is not correctly identified by the lastDigit() method.