code doubt

[anishkannan]

string str = "hai"; Console.WriteLine(str==str); Console.WriteLine("Hello"+str==str); Output: True False Have doubt in second,... why did not print "Hello" and why print False instead of True

[Luc Pattyn]

Hi, you should check the documentation on operator precedence to find out whether "Hello"+str==str is the same as "Hello"+(str==str) or is the same as ("Hello"+str)==str :)

Luc Pattyn

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[dybs]

Argh, beat me to it! :)

[dybs]

Operator precedence.[^] Dybs

[CPallini]

anishkannan wrote:

why did not print "Hello" and why print False instead of True

I guess there's a common reason for... :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

[rakesh_choudhury]

For Console.WriteLine(str==str); here compiler checks "hai" is "hai" or not !! Compiler : Yes So your Console.WriteLine(str==str); is "True". For Console.WriteLine("Hello"+str==str); now the compiler checks is "Hellohai"(the outcome of "Hello"+str) is "hai". "Hellohai" == "hai" Compiler : no So your Console.WriteLine("Hello"+str==str); is "False". The key portion here is C# operator Precedence. :-O