Part-1: C++, C#, Java Syntax Differences

C++ Main Function

1. Main function with out any arguments

void main() { 
  cout<<"Hello World !!!"; 
} 

2. Main function with commandline Arguments

int main(int argc, char* argv[]) {
   cout<<"Hello World !!!"; 
   return 1; 
} 

C# Main Function

1. Main function with out any arguments

using System; 
namespace CSharpSample { 
  class Program { 
  static void Main() { 
    Console.WriteLine("Hello World !!!"); 
    } 
  } 
} 

2. Main Function with commandline Arguments

 using System; 
 namespace CSharpSample { 
  class Program { 
    static int Main(string[] args) {
       Console.WriteLine("Hello World !!!"); 
       return 1; 
       } 
   } 
} 

Java Main function

1. Main function with out any arguments Not possible Compilation error java.lang.NoSuchMethodError: main Exception in thread "main" Main function with commandline Arguments

2. Main Function with commandline Arguments

public class Program { 
  public static void main(String args[]) {
     System.out.println( "Hello, World !!!" ); 
     } 
}