# Program for n-th odd number

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, ..
```

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

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

 ` `

Output:

```19
```

My Personal Notes arrow_drop_up Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : ihritik, inderDuMCA