If I have a function with an optional argument like so:
public string testFunction (string arg1 = "Adam"){
return "Hello " + arg1;
}
If I pass a null string to the function, will the function return:
"Hello Adam"
Or:
"Hello " (Hello null)
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Adam Nygate
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3Try it out and report back. Hint: `null` is not a literal value, but it is a value. – Jeroen Vannevel Oct 18 '13 at 02:44
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@JeroenVannevel `null` most certainly *is* a literal value. – Servy Oct 18 '13 at 02:56
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@Servy: yeah, I guess I was a little ambiguous. I meant to say that `null` does not represent a text representation of `null`. – Jeroen Vannevel Oct 18 '13 at 03:00
2 Answers
2
This is quite simple to just try out with a simple C# console application.
The answer is that arg1 is null, and the output is Hello
foolmoron
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The way you have it currently setup, the default is "Adam", so you can call the function like so; string mystring = testfunction(); and it will return "Hello Adam", anything you pass in, will replace Adam, including null.
Trent
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