📜  程序第n个偶数

📅  最后修改于: 2021-05-31 18:11:41             🧑  作者: Mango

给定数字n,请打印第n个偶数。第一个偶数是2,第二个偶数是4,依此类推。

例子:

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..
C++
// CPP program to find the nth even number
#include 
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

Output:20


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