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Images from Africa

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My little Haitian friend Antoine (1985)

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Solid Terrain Models

http://www.stm-usa.com/

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3D Touch Table

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Overview

Variables & ExpressionsBasic C# SyntaxCommentsDeclaring & initializing variables

Flow controlBoolean logicBranching & looping

Advanced typesenum, struct, Array

Type conversionsFunctionsVariable scope

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Basic C# Syntax

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Comments

//, ///, /* */

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Declaring & Initializing variables

<type> <name>;<name> = <initial_value>;

OR<type> <name> = <initial_value>;

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Types – esp. Value

Apart from bool, char,& enum, value types havea range of numbers theysupport (p. 37)

Type Range

byte 0 to 255

sbyte -128 to 127

short -32768 to 32767

int -2147483648 to2147483647

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For real numbers …

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Most commonly used types

int

string

double

bool

char

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Variable names & initial values

<type> <name> = <initial_value>;

Variable namesCannot

Be a C# keywordBegin with a number or special char except _ and @Contain numbers and chars (-, ', etc)

ShouldBe camelCaseDescribe the content

Initial values0 for numbers or what makes sense for appstring.Empty / "" for strings, etc.

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Expressions<variable> = <operand> <operator> <operand><variable> = <operator> <operand><variable> = <operand>

Output

z = ++x // z assigned value x + 1z = x++ // z assigned value of x before x is incremented

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Overview

Variables & ExpressionsBasic C# SyntaxCommentsDeclaring & initializing variables

Flow controlBoolean logicBranching & looping

Advanced typesenum, struct, Array

Type conversionsFunctionsVariable scope

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Boolean Logic

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Branching with if

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Branching with switch

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Looping with for

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Looping with while

If condition is false, while is not executed at all.

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Looping with do

Executed once before condition is checked

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Interrupting loops

breakExit from loop

continueReturn to top of loop

returnExit from loop & containing function

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Overview

Variables & ExpressionsBasic C# SyntaxCommentsDeclaring & initializing variables

Flow controlBoolean logicBranching & looping

Advanced typesenum, struct, Array

Type conversionsFunctionsVariable scope

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Advanced types – enum

To constrain the possible values for a variableDeclared at same level as classPlain text names associated with number

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Advanced types – struct

A custom, multi-valued, type that can have functions

Declared at same level as classCan contain value types (int, long, double, etc) and strings

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Advanced types – Array

Making it easier to create/access groups of values of the same type

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Overview

Variables & ExpressionsBasic C# SyntaxCommentsDeclaring & initializing variables

Flow controlBoolean logicBranching & looping

Advanced typesenum, struct, Array

Type conversionsFunctionsVariable scope

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Type conversions

Types with smaller range can be implicitly converted to types with larger rangeOther types MAY be explicitly converted target_type outvar = (target_type) variableName

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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.

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Params by ref and by value

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Variable Scope

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Funny if it wasn’t true

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My version