# Check if a HexaDecimal number is Even or Odd

• Last Updated : 28 Apr, 2021

Given a HexaDecimal number, check whether it is even or odd.
Examples:

```Input: N = ABC7787CC87AA
Output: Even

Input: N = 9322DEFCD
Output: Odd```

Naive Approach:

Time Complexity: O(N)
Efficient approach: Since Hexadecimal numbers contain digits from 0 to 15, therefore we can simply check if the last digit is either ‘0’, ‘2’, ‘4’, ‘6’, ‘8’, ‘A'(=10), ‘C'(=12) or ‘E'(=14). If it is, then the given HexaDecimal number will be Even, else Odd.
Below is the implementation of the above approach.

## C++

 `// C++ code to check if a HexaDecimal``// number is Even or Odd` `#include ``using` `namespace` `std;` `// Check if the number is odd or even``string even_or_odd(string N)``{``    ``int` `len = N.size();` `    ``// check if the last digit``    ``// is either '0', '2', '4',``    ``// '6', '8', 'A'(=10),``    ``// 'C'(=12) or 'E'(=14)``    ``if` `(N[len - 1] == ``'0'``        ``|| N[len - 1] == ``'2'``        ``|| N[len - 1] == ``'4'``        ``|| N[len - 1] == ``'6'``        ``|| N[len - 1] == ``'8'``        ``|| N[len - 1] == ``'A'``        ``|| N[len - 1] == ``'C'``        ``|| N[len - 1] == ``'E'``)``        ``return` `(``"Even"``);``    ``else``        ``return` `(``"Odd"``);``}` `// Driver code``int` `main()``{``    ``string N = ``"AB3454D"``;` `    ``cout << even_or_odd(N);` `    ``return` `0;``}`

## Java

 `// Java code to check if a HexaDecimal``// number is Even or Odd``class` `GFG{`` ` `// Check if the number is odd or even``static` `String even_or_odd(String N)``{``    ``int` `len = N.length();`` ` `    ``// check if the last digit``    ``// is either '0', '2', '4',``    ``// '6', '8', 'A'(=10),``    ``// 'C'(=12) or 'E'(=14)``    ``if` `(N.charAt(len - ``1``) == ``'0'``        ``|| N.charAt(len - ``1``) == ``'2'``        ``|| N.charAt(len - ``1``) == ``'4'``        ``|| N.charAt(len - ``1``) == ``'6'``        ``|| N.charAt(len - ``1``) == ``'8'``        ``|| N.charAt(len - ``1``) == ``'A'``        ``|| N.charAt(len - ``1``) == ``'C'``        ``|| N.charAt(len - ``1``) == ``'E'``)``        ``return` `(``"Even"``);``    ``else``        ``return` `(``"Odd"``);``}`` ` `// Driver code``public` `static` `void` `main(String[] args)``{``    ``String N = ``"AB3454D"``;``    ``System.out.print(even_or_odd(N));``}``}` `// This code is contributed by 29AjayKumar`

## Python 3

 `# Python code to check if a HexaDecimal``# number is Even or Odd` `# Check if the number is odd or even``def` `even_or_odd(N):``    ``l ``=` `len``(N)` `    ``# check if the last digit``    ``# is either '0', '2', '4',``    ``# '6', '8', 'A'(=10),``    ``# 'C'(=12) or 'E'(=14)``    ``if` `(N[l ``-` `1``] ``=``=` `'0'``or` `N[l ``-` `1``] ``=``=` `'2'``or``        ``N[l ``-` `1``] ``=``=` `'4'``or` `N[l ``-` `1``] ``=``=` `'6'``or``        ``N[l ``-` `1``] ``=``=` `'8'``or` `N[l ``-` `1``] ``=``=` `'A'``or``        ``N[l ``-` `1``] ``=``=` `'C'``or` `N[l ``-` `1``] ``=``=` `'E'``):``        ``return` `(``"Even"``)``    ``else``:``        ``return` `(``"Odd"``)` `# Driver code``N ``=` `"AB3454D"` `print``(even_or_odd(N))` `# This code is contributed by Atul_kumar_Shrivastava`

## C#

 `// C# code to check if a HexaDecimal``// number is Even or Odd``using` `System;` `public` `class` `GFG{` `    ``// Check if the number is odd or even``    ``static` `string` `even_or_odd(``string` `N)``    ``{``        ``int` `len = N.Length;``    ` `        ``// check if the last digit``        ``// is either '0', '2', '4',``        ``// '6', '8', 'A'(=10),``        ``// 'C'(=12) or 'E'(=14)``        ``if` `(N[len - 1] == ``'0'``            ``|| N[len - 1] == ``'2'``            ``|| N[len - 1] == ``'4'``            ``|| N[len - 1] == ``'6'``            ``|| N[len - 1] == ``'8'``            ``|| N[len - 1] == ``'A'``            ``|| N[len - 1] == ``'C'``            ``|| N[len - 1] == ``'E'``)``            ``return` `(``"Even"``);``        ``else``            ``return` `(``"Odd"``);``    ``}``    ` `    ``// Driver code``    ``static` `public` `void` `Main ()``    ``{``        ``string` `N = ``"AB3454D"``;``    ` `        ``Console.WriteLine(even_or_odd(N));``    ``}``}` `// This code is contributed by shubhamsingh10`

## Javascript

 ``
Output:
`Odd`

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