# Program for n-th odd number

Last Updated : 20 Aug, 2022

Given a number n, print the nth odd number. The 1st odd number is 1, 2nd is 3, and so on.
Examples:

```Input : 3
Output : 5
First three odd numbers are 1, 3, 5, ..

Input : 5
Output : 9
First 5 odd numbers are 1, 3, 5, 7, 9, ..```

The nth odd number is given by the formula 2*n-1.

## C++

 `// CPP program to find the nth odd number` `#include ` `using` `namespace` `std;`   `// Function to find the nth odd number` `int` `nthOdd(``int` `n)` `{` `    ``return` `(2 * n - 1);` `}`   `// Driver code` `int` `main()` `{` `    ``int` `n = 10;` `    ``cout << nthOdd(n);` `    ``return` `0;` `}`

## Java

 `// JAVA program to find the nth odd number`   `class` `GFG` `{` `    ``// Function to find the nth odd number` `    ``static` `int` `nthOdd(``int` `n)` `    ``{` `        ``return` `(``2` `* n - ``1``);` `    ``}` `    `  `    ``// Driver code` `    ``public` `static` `void` `main(String [] args)` `    ``{` `        ``int` `n = ``10``;` `        ``System.out.println(nthOdd(n));` `        `  `    ``}` `}`   `// This code is contributed` `// by ihritik`

## Python3

 `# Python 3 program to find the ` `# nth odd number`   `# Function to find the nth odd number` `def` `nthOdd(n):`   `    ``return` `(``2` `*` `n ``-` `1``)` `    `  `    `  `# Driver code` `if` `__name__``=``=``'__main__'``:` `    ``n ``=` `10` `    ``print``(nthOdd(n))`   `# This code is contributed` `# by ihritik`

## C#

 `// C# program to find the nth odd number` `using` `System;`   `class` `GFG` `{` `    `  `// Function to find the nth odd number` `static` `int` `nthOdd(``int` `n)` `{` `    ``return` `(2 * n - 1);` `}`   `// Driver code` `public` `static` `void` `Main()` `{` `    ``int` `n = 10;` `    ``Console.WriteLine(nthOdd(n));` `}` `}`   `// This code is contributed` `// by inder_verma`

## PHP

 ``

## Javascript

 ``

Output:

`19`

Time Complexity: O(1)

Auxiliary Space: O(1)

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