c# - Indexing in Linq -

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Why do we use the index in "clause"? Does it start with an auto generated number answer zero? Simple examples would really be helpful. 

  var query = ... ou ((p, index) ..)

Whenever you need access to the index in your query, use it.

var alphabet = "ABCDEFGHKJLMNOPQRSTUVX"; Var also Litter = Alphabet. Where ((p, index) => (index% 2) == 1); Var oddLetters = alphabet.Where ((P, index) => (index% 2) == 0);

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