Learning C# 2005

3.1. Statements In C#, a complete program instruction is called a statement and each statement ends with a semicolon (;) . Programs consist of sequences of statements such as: int myVariable; // a statement myVar...

3.2. Types C# is a strongly typed language. That means that every object you create or use in a C# program must have a specific type (e.g., you must declare the object to be an integer or a string or a Dog or a Button). Essentially, the type indic...

3.3. Variables A variable is an instance of an intrinsic type (such as int) that can hold a value: int myVariable = 15; You initialize a variable by writing its type, its identifier, and then assigning a value to that variable. ...

3.4. Definite Assignment C# requires definite assignment ; that is, variables must be initialized (or assigned to) before they are "used." To test this rule, change the line that initializes myInt in Example 3-1 to: int myInt; Sa...

3.5. Constants Variables are a powerful tool, but there are times when you want to manipulate a defined value, one whose value you want to ensure remains constant. A constant is like a variable in that it can store a value. However, unlike a va...

3.6. Strings It is nearly impossible to write a C# program without creating strings . A string object holds a series of characters. You declare a string variable using the string keyword much as you would create an instance of any type: ...

3.7. Expressions Statements that evaluate to a value are called expressions . You may be surprised how many statements do evaluate to a value. For example, an assignment such as: myVariable = 57; is an expression; it evaluates to...

3.8. Whitespace In the C# language, spaces, tabs, and newlines are considered to be whitespace (so named because you see only the white of the underlying "page"). Extra whitespace is generally ignored in C# statements. Thus, you can write: ...

3.9. Summary A complete program instruction is called a statement. Each statement ends with a semicolon (;).All objects, constants, and variables must have a specific type.Most of the intrinsic types are used for working with numeric values. You w...

3.10. Quiz Question 31. What values can a bool type have? Question 32. What is the difference between an int and an Int32? Question 33. Which of the following code statements will compile? int myInt = 25; long myLong = myInt...