Programa para n-ésimo número impar

Dado un número n, imprima el n-ésimo número impar. El primer número impar es 1, el segundo es 3 y así sucesivamente.
Ejemplos: 
 

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, ..

El enésimo número impar viene dado por la fórmula 2*n-1.

// CPP program to find the nth odd number
#include <bits/stdc++.h>
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 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

# 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# 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
// PHP program to find the
// Nth odd number
 
// Function to find the
// Nth odd number
function nthOdd($n)
{
    return (2 * $n - 1);
}
 
// Driver code
$n = 10;
echo nthOdd($n);
 
// This code is contributed
// by inder_verma
?>

<script>
 
// Javascript program to find the nth odd number
 
// Function to find the nth odd number
function nthOdd(n)
{
    return (2 * n - 1);
}
 
// Driver code
 
var n = 10;
document.write( nthOdd(n));
 
 
</script>

Producción: 

19