Program for n-th even number
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)