Can we assign null to int in c#

In C programs, a List reference can be null. This is not the same as it being empty and having zero elements. We must often test for null lists. Keyword info. The null literal in the C language is a special-cased zero value for reference types. It is used often with the List type.

This program declares 3 List references and checks them against null. The program shows the difference between a List that is a field, such as a static List, and a List that is a local variable. GetValueOrDefault : This method returns the actually assigned value of the Nullable type variable if the value is not null, and if the variable value is null, then it will give the default value of that data type.

Here is the example code. To use the Nullable type as a local variable, it should be declared first; it will give a compile-time error. This rule is similar to the value data type. If the Nullable variable is a property in a class and after that, if we are accessing that Nullable variable, then it will not give any error because, in the class variable, it is declared as null automatically.

We can not assign the Nullable type variable value to the non-nullable type variable directly. As in the example below, if we try to assign the value, it will give the compile-time error. For the Nullable variable, we can use the null coalescing operator?? Then we can assign the non-nullable type variable value according to that. This operator can be used when we are unsure that at run time if that Nullable variable's value is changed according to our logic or not.

Here is an example of that. In the above example, if the variable a value is null,, it will assign the value 10 to b variable. In that case, b is assigned with value 10, and the printed value will be In this article, We have discussed the Nullable types, and it's properties and methods. The main advantage of using the Nullable types is that we can store the Null value in a column of a database using this type.

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If the object is not assigned with any value then it will give compile-time error. WriteLine a. WriteLine b. You can also use GetValueOrDefault T method to get the assigned value or the provided default value, if the value of nullable type is null.

You can also use null-coalescing operator?? Nullable types do not support var type. If you use Nullable with var, then the compiler will give you a compile-time error. Advantage of Nullable Types: The main use of nullable type is in database applications. Suppose, in a table a column required null values, then you can use nullable type to enter null values. Nullable type is also useful to represent undefined value. You can also use Nullable type instead of a reference type to store a null value.

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