C# Lambda ( => )

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Lambda Explanation and what it is as well as a good example
C# Lambda expression, why should I use this?

Can someone explain to me how to use this and give me examples? How do we read it?

Example != is read as "not equals to." So => means what?

Possible duplicate of http://stackoverflow.com/questions/2333560/lamda-explanation-and-what-it-is-as-well-as-a-good-example. — Pieter van Ginkel, Oct 19 '10 at 15:55
`!=` and `=>` have nothing in common, except for the `=` character. But that's it. — FrustratedWithFormsDesigner, Oct 19 '10 at 15:57
Wait... were you actually asking how it should be pronounced when reading it out loud? — FrustratedWithFormsDesigner, Oct 19 '10 at 15:58
@Frustrated [Pronunciation guide](http://stackoverflow.com/questions/274022/how-do-i-pronounce-as-used-in-lambda-expressions-in-net). — Josh Lee, Oct 19 '10 at 16:00

score 6 · Answer 1 · answered Oct 19 '10 at 15:56

All lambda expressions use the lambda operator =>, which is read as "goes to". The left side of the lambda operator specifies the input parameters (if any) and the right side holds the expression or statement block. The lambda expression x => x * x is read "x goes to x times x." This expression can be assigned to a delegate type as follows:

From the docs

the => operator has the same precedence as assignment (=) and is right-associative.

score 5 · Answer 2 · answered Oct 19 '10 at 15:57

5

"=>" is lambda operator and is read as "goes to"

answered Oct 19 '10 at 15:57

QYY

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score 5 · Answer 3 · answered Oct 19 '10 at 15:58

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This is the lambda operator. Which means 'goes to'. It is used to create lambda expressions which is syntax offered by C# for anonymous methods.

eg. lamda expression x=>x > 2. This mean that given x, x goes to x greater than 2. In other words this lambda expression will select x greater than 2.

Anonymous method for the same can be written as

delegate(int x){return x > 2;}

answered Oct 19 '10 at 15:58

AlwaysAProgrammer

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Surely its only right to say it will select x greater than 2 if the lambda is used as part of a select. Woudln't it be more accurate to say that it would return true if x > 2 and false otherwise or something similar? – Chris Oct 19 '10 at 16:21
you are right. I jumbled up both of them. Good Catch – AlwaysAProgrammer Oct 19 '10 at 18:48

score 3 · Answer 4 · answered Oct 19 '10 at 15:55

3

http://msdn.microsoft.com/en-us/library/bb397687.aspx

The => operator has the same precedence as assignment (=) and is right-associative.

answered Oct 19 '10 at 15:55

kyndigs

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That's the perfect answer. And to make it more perfect, I would add "'=>' reads 'goes to'". :) – Wonko the Sane Oct 19 '10 at 15:58

C# Lambda ( => )

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