C :

#include<stdio.h>
int main()
{
	printf("Nice to meet you!\n");
	return 0;
}

C++ :

#include <iostream>
 using namespace std;
 int  main()
 {
     cout <<"Nice to meet you!" << endl;
     return 0;
 } 

Pascal :

begin
    writeln('Nice to meet you!');
end.

Java :

public class Main {
	public static void main(String[] args)
	{
		System.out.print("Nice to meet you!\n");
	}
}

Python :

# coding=utf-8
#!/usr/bin/python2
import sys
print "Nice to meet you!"

C# :

using System;
namespace ConsoleApp2
{
    internal class Program
    {
        static void Main()
        {
                Console.WriteLine("Nice to meet you!");
                Console.ReadKey();
        }
    }
}