c# keywords, identifiers and Naming Conventions

Introduction to c# keywords, identifiers and naming conventions

1. C# FOR BEGINNERS LESSON 1 MICHEAL OGUNDERO CONTACT : Email – [email protected] Keywords, Identifiers and Naming Conventions

2. IN THIS LESSON KEYWORDS IDENTIFIERS NAMING CONVENTIONS

3. KEYWORDS Keywords are predefined sets of reserved words that have special meaning in a program . C# has a total of 79 keywords. All these keywords are in lowercase. We’ll discuss some other keywords called contextual keywords in subsequent lessons. In the next slide is a complete list of all c# keywords!

4. KEYWORDS abstract as base bool break byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if implicit in in (generic modifier) int interface internal is lock long namespace new null object operator out out (generic modifier) override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using using static void volatile while

5. IDENTIFIERS Identifiers just as the name implies are used to identify variables, methods, classes or any other user-defined item .

6. RULES FOR NAMING IDENTIFIERS An identifier cannot be a C# keyword. An identifier must begin with a letter, an underscore or @ symbol. The remaining part of an identifier can contain letters, digits and underscore symbol. Whitespaces are not allowed. Neither can it have symbols other than letter, digits and underscore. Identifiers are case-sensitive. Therefore,  mycat ,  myCat  and  MyCat  represents 3 different identifiers.

7. NAMING CONVENTIONS Camel case ( camelcase ): in this the first letter of word is always in small letter and after that each word with capital letter. Pascal case ( pascalcase ): in this the first letter of every word is in capital letter. Underscore prefix (_underscore): for underscore (__), the word after _ use camelcase terminology.

8. NAMING CONVENTIONS - Examples airConditioner – camelCase AirConditioner – Pascal _ airConditioner - underscore

9. NEXT LESSON DataTypes , variables and constants THANK YOU!