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Improve documentation and handle negative numbers in palindrome.c #1542

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Improve documentation and handle negative numbers in palindrome.c #1542

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6 changes: 6 additions & 0 deletions math/palindrome.c
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Original file line number Diff line number Diff line change
Expand Up @@ -22,12 +22,18 @@ int main()

/**
* Check given number whether is palindrome number or not
* A palindrome number is read same backward as forward. Eg.123321
* Negative numbers are not considered palindromes.
* @param number number to check
* @return `true` if given number is palindrome number
* @return `false` if number is not a palindrome number
*/
bool isPalindrome(int number)
{
if(number<0)
{
return false; // negative numbers can not be palindromes
}
int reversedNumber = 0;
int originalNumber = number;
while (number != 0)
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