C# requires the programmer to use names from letters chosen from a through zA through Z, and numbers are chosen from 0 through 9.

Best practise to for naming a variable is to use :

  1. Camel Case. First word in variable name is in small letter and Second word in variable name is capital letter. Example : rollNumber
  2. Use relevant names to explain the variable use instead of names like x , y and z. Example : candidateName

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