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# Check if a HexaDecimal number is Even or Odd

• Last Updated : 17 Jul, 2022

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`

Time complexity: O(1)

Auxiliary Space: O(1)

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