1. 1 of 32 Images from Africa

2. 2 of 32 My little Haitian friend Antoine (1985)

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4. 4 of 32 3D Touch Table

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6. 6 of 32 Overview Variables & Expressions Basic C# Syntax Comments Declaring & initializing variables Flow control Boolean logic Branching & looping Advanced types enum, struct, Array Type conversions Functions Variable scope

7. 7 of 32 Basic C# Syntax

8. 8 of 32 Comments //, ///, /* */

9. 9 of 32 Declaring & Initializing variables ; = ; OR = ;

10. 10 of 32 Types – esp. Value Apart from bool, char, & enum, value types have a range of numbers they support (p. 37) TypeRange byte0 to 255 sbyte-128 to 127 short-32768 to 32767 int-2147483648 to 2147483647

11. 11 of 32 For real numbers …

12. 12 of 32 Most commonly used types int string double bool char

13. 13 of 32 Variable names & initial values = ; Variable names Cannot Be a C# keyword Begin with a number or special char except _ and @ Contain chars like -, ‘, etc) Should Be camelCase Describe the content Initial values 0 for numbers or what makes sense for app string.Empty / “” for strings, etc.

14. 14 of 32 Expressions = // x = x + 1, z = x + 1 // x = x + 1, z = x // x = x - 1, z = x – 1 // x = x - 1, z = x p. 46, 47 in Watson et al. ++x add before expression evaluated x++ add after expression evaluated

15. 15 of 32 Overview Variables & Expressions Basic C# Syntax Comments Declaring & initializing variables Flow control Boolean logic Branching & looping Advanced types enum, struct, Array Type conversions Functions Variable scope

16. 16 of 32 Boolean Logic

17. 17 of 32 Branching with if

18. 18 of 32 Branching with switch

19. 19 of 32 Looping with for

20. 20 of 32 Looping with while

21. 21 of 32 Looping with do

22. 22 of 32 Interrupting loops break Exit from loop continue Return to top of loop return Exit from loop & containing function

23. 23 of 32 Overview Variables & Expressions Basic C# Syntax Comments Declaring & initializing variables Flow control Boolean logic Branching & looping Advanced types enum, struct, Array Type conversions Functions Variable scope

24. 24 of 32 Advanced types – enum To constrain the possible values for a variable Declared at same level as class Plain text names associated with number

25. 25 of 32 Advanced types – struct A custom, multi-valued, type that can have functions Declared at same level as class Can contain value types (int, long, double, etc) and strings

26. 26 of 32 Advanced types – Array Making it easier to create/access groups of values of the same type

27. 27 of 32 Overview Variables & Expressions Basic C# Syntax Comments Declaring & initializing variables Flow control Boolean logic Branching & looping Advanced types enum, struct, Array Type conversions Functions Variable scope

28. 28 of 32 Type conversions Types with smaller range can be implicitly converted to types with larger range Other types MAY be explicitly converted target_type outvar = (target_type) variableName

29. 29 of 32 Functions: Defining and calling Syntax for defining functions: [ scope] [static] return_type name ([params]) { // C# statements [return [return_value]]; } 0 or more params are declared like variables and comma separated.

30. 30 of 32 Params by ref and by value

31. 31 of 32 Variable Scope

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