There are times when you want to use special characters or strings that contain special characters, like new line. Obviously, just writing the line on a new line in your code will not do the trick. This is where escape sequences come in handy.… Read more
Escape sequences
January 3rd, 2017Value and reference types
January 3rd, 2017Variables in C# can be categorized in two main types: value and reference types. What is the difference between them?
Value types are stored in a special area which is called the execution stack and their value is directly stored and accessed.… Read more
Nullable variable types
December 29th, 2016You may have noticed already that some variables can have a default value of null, while others can’t. Well, that is not entirely true. Nullable variable types refers to exactly this situation: creating a specific wrapper around the value types (types that cannot be null), that allow them to store data with a null value.… Read more
Object variable type
December 29th, 2016Object variable type is a special type, the parent of all other types in the .NET Framework. It can accept values from any other type in C#, and we declare it using the word object.
In the following example you can see how we can assign any type to an object variable type:
Var keyword
December 29th, 2016In the previous lessons, I’ve said that when declaring a variable, we are required to indicate the compiler the type of the variable and its name. These kind of variables are called explicitly typed variables:
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int integerVariable = 123; // explicitly typed variable |
However, this is not entirely true.… Read more
String variable type
December 29th, 2016If you remember the lesson about char variable type, you know that a char can only store a single character. And you also remember that for storing more than a single character, I said you will be using the string variable type.… Read more
Boolean variable type
December 29th, 2016The Boolean variable type is probably the easiest type of variable. It doesn’t have a “maximum range”, it can’t produce “overflow” exceptions, it’s not affected by precision, etc. In fact, Boolean variable type can only have two values: true or false. … Read more
Real types error calculations
December 29th, 2016In calculations with real floating-point data types it is possible to observe strange behavior, because during the representation of a given real number it often happens to lose accuracy. The reason for this is the inability of some real numbers to be represented exactly as a sum of negative powers of the number 2.… Read more