Primitive Data Types and Variables - EEMB DERSLER

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Floating Floating-Point Point and Decimal Floating Floating-Point Point Types Example 02 02-03;02 03;02-04 04 The Boolean data type: type The Boolean Data Type Is declared by the bool keyword Has two possible values values: : true and false Is useful in logical expressions The default value is false Boolean Type Example 02 02-05; 05; 02-06 02 06 21 Boolean Type Boolean Values – Example Example of boolean variables taking values of true or false false: int a = 1; int b = 2; bool greaterAB = (a > b); Console.WriteLine(greaterAB); // False bool equalA1 = (a == 1); Console.WriteLine(equalA1); // True Character Type 10/3/2011 22 4
The character data type type: The Character Data Type Represents symbolic information Is declared by the char keyword Gives each symbol a corresponding integer code Has a '\0' 0' default value Takes 16 bits of memory (from U+0000 to U+FFFF U+FFFF) The string data type type: Character Type Example 02 02-07 07 The String Data Type Represents a sequence of characters Is declared by the string keyword Has a default value null (no value) Strings are enclosed in quotes: string s = "Microsoft .NET Framework"; Strings can be concatenated Using the + operator 25 29 Characters and Codes The example below shows that every symbol has an its unique Unicode code: code char symbol = 'a'; Console.WriteLine("The code of '{0}' is: {1}", symbol, ( (int int) ) symbol); symbol = 'b'; Console.WriteLine("The code of '{0}' is: {1}", symbol, ( (int int) ) symbol); symbol = 'A'; Console.WriteLine("The code of '{0}' is: {1}", symbol, ( (int int) ) symbol); String Type Saying Hello – Example Concatenating the two names of a person to obtain his full name: string firstName = "Ivan"; string lastName = "Ivanov"; Console.WriteLine("Hello, {0 {0}! }!\n", n", firstName); string fullName = firstName + " " + lastName; lastName Console.WriteLine("Your full name is {0 {0}.", }.", fullName fullName); ); NOTE: a space is missing between the two names! We have to add it manually 10/3/2011 26 30 5
Page 1 and 2: A data type type: Primitive Data Ty
Page 3: Floating Floating-Point Point and D
Page 7 and 8: A variable is a: What Is a Variable
Page 9 and 10: Literals The boolean literals are:
Page 11 and 12: Nullable String Literals Example 02

Primitive Data Types and Variables - EEMB DERSLER

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