Integer null value c#

Empty String. We can also understand the Null value method by taking more examples. It would not be wrong to say that Null values are equally important and cannot be overlooked in any programming language, and this is so in C as well.

Here the Null values can be treated in many ways, and they are just a few cases of them. In this post, we discussed in detail about these keywords of C.

However, Null Coalescing has certain advantages and disadvantages as well as if it is incorporated inside the code then it can decrease the number of lines of the code. Though it cannot improve the performance of speed of the program but can optimize the code. As a result, the code becomes easier to understand. View All. Manchun Kumar Updated date Aug 13, Let us start our discussion with an example where we will assign a NULL value to a value type variable,.

This problem can be solved in the following two ways,. These are the ways to convert a non-nullable value type to nullable value type in C. You can try post on codereview. An "integer value" is never null , so the answer is simple: "it isn't". Add a comment. Active Oldest Votes. Value : 0;. Adam Houldsworth Adam Houldsworth Good answer; func fact, though: the parameterless age.

GetValueOrDefault is marginally faster - it completely bypasses the "do I have a value" check, and just returns the value field - which will have defaulted to default T , aka 0. MarcGravell Cool, but for the purposes of the answer I chose to be explicit. Several things: Age is not an integer - it is a nullable integer type. To check if a nullable type has a value use HasValue , or check directly against null : if Age.

Oded Oded k 96 96 gold badges silver badges bronze badges. Simply you can do this: public void CheckNull int? Fereydoon Barikzehy Fereydoon Barikzehy 3, 1 1 gold badge 32 32 silver badges 38 38 bronze badges. GetType method on an instance of a nullable value type, the instance is boxed to Object.

As boxing of a non-null instance of a nullable value type is equivalent to boxing of a value of the underlying type, GetType returns a Type instance that represents the underlying type of a nullable value type:.

Also, don't use the is operator to determine whether an instance is of a nullable value type. As the following example shows, you cannot distinguish types of a nullable value type instance and its underlying type instance with the is operator:. You can use the code presented in the following example to determine whether an instance is of a nullable value type:. The methods described in this section are not applicable in the case of nullable reference types.

For more information, see the following sections of the C language specification :. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback?

Note C 8. Note For the bool? Note The methods described in this section are not applicable in the case of nullable reference types. Ask Question. Asked 6 years, 10 months ago. Active 3 years, 10 months ago. Viewed 81k times. In C , what is the default value of a class instance variable of type int?

Improve this question. Jogge 1, 10 10 silver badges 29 29 bronze badges. Jon Schneider Jon Schneider Why the downvote? The answer to this question wasn't initially obvious to me without actually running the code to test the behavior; and surprisingly, I couldn't find a duplicate of this question on StackOverflow, or easily findable elsewhere via Google. You could have looked here - first google hit for me. It does say "The default value for HasValue is false.

The Value property has no default value", but that doesn't directly answer my original question without some additional digging. I wonder if it was because you could just set a breakpoint and see what the value is, or in the Immediate Window type int?