Given a number n, print the nth even number. The 1st even number is 2, 2nd is 4 and so on.
Examples:
Input : 3
Output : 6
First three even numbers are 2, 4, 6, ..Input : 5
Output : 10
First five even numbers are 2, 4, 6, 8, 19..
The nth even number is given by the formula 2*n.
C++
// CPP program to find the nth even number #include <bits/stdc++.h> using namespace std;
// Function to find the nth even number int nthEven( int n)
{ return (2 * n);
} // Driver code int main()
{ int n = 10;
cout << nthEven(n);
return 0;
} |
Java
// JAVA program to find the nth EVEN number class GFG
{ // Function to find the nth odd number
static int nthEven( int n)
{
return ( 2 * n);
}
// Driver code
public static void main(String [] args)
{
int n = 10 ;
System.out.println(nthEven(n));
}
} // This code is contributed // by ihritik |
Python3
# Python 3 program to find the # nth odd number # Function to find the nth Even number def nthEven(n):
return ( 2 * n)
# Driver code if __name__ = = '__main__' :
n = 10
print (nthEven(n))
# This code is contributed # by ihritik |
C#
// C# program to find the // nth EVEN number using System;
class GFG
{ // Function to find the // nth odd number static int nthEven( int n)
{ return (2 * n);
} // Driver code public static void Main()
{ int n = 10;
Console.WriteLine(nthEven(n));
} } // This code is contributed // by anuj_67 |
PHP
<?php // PHP program to find the // nth even number // Function to find the // nth even number function nthEven( $n )
{ return (2 * $n );
} // Driver code $n = 10;
echo nthEven( $n );
// This code is contributed // by anuj_67 ?> |
Javascript
// JavaScript program to find the nth even number // Function to find the nth even number function nthEven(n)
{ return (2 * n);
} // Driver code let n = 10; console.log(nthEven(n)); // This code is contributed by phasing17 |
Output
20
Time Complexity: O(1)
Auxiliary Space: O(1)