Method parameters

[several]

Hello. I'm trying to play around with Methods for the first time but struggling with some basics.

private void MyMethod (int MyInt)
{
Print("MyInt = " + Convert.ToString(MyInt));
}

Then:

MyMethod(200);

This works but when I try to pass a string, it doesn't. I get told 'Hello' doesn't exist.

private void MyMethod (string MyString)
{
Print("MyString = " + MyString);
}

Then:

MyMethod(Hello);

[NinjaTrader_Jesse]

Hello several,

Strings always require quotes, you are just missing the quotes around hello. Without the quotes that is evaluating like a variable and because you don't have a variable named hello you get that error.
MyMethod("Hello");