# Check if a HexaDecimal number is Even or Odd

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

Examples:

```Input: N = ABC7787CC87AA
Output: Even

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

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

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 `

Output:

```Odd
```

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