Please tell me what's wrong with this code!

Question

namespace SoloLearn
{.
class Program
{
static void Main(string[] args)
{

int a=0;
Console.WriteLine("please enter the username:");
string user=Console.ReadLine();
Console.WriteLine("please enter the password:");
string pass=Console.ReadLine();
For(a;a<<3;a++)
{if(user==ftmhrb && pass==123456)
{Console.WriteLine("welcome");
else}
{Console.WriteLine("ERROR");}
}

}
}
}

Answer 1

Thank you

Answer 2

namespace SoloLearn
{ //. bug #1( . )
class Program
{
static void Main(string[] args)
{

int a=0;
for(;a<3;a++)
// bug #2(For); bug #3(a;); bug #4(<<)
{
Console.WriteLine("please enter the username:"); // debug #5
string user=Console.ReadLine(); //debug #6
Console.WriteLine("please enter the password:"); // debug #7
string pass=Console.ReadLine(); //debug #8
if(user=="ftmhrb" && pass=="123456") //bug #9(ftmhrb); bug #10(123456)
{Console.WriteLine("welcome"); // bug #11
break; //debug #12( } )
else} // bug #13( } )
{Console.WriteLine("ERROR");}
}

}
}
}

Answer 3

Vasiliy nice code

Answer 4

Vaibhav Pathak, thank.