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This article mainly explains how to use the Null merge operator of C#. Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use the Null merge operator of C#.

Null merge operator (?)

The Null merge operator is used to define default values for nullable and reference types. The Null merge operator defines a default value for type conversions in case the value of a nullable type is Null. The Null merge operator implicitly converts an Operand type to an Operand of another nullable (or non-nullable) value type.

If the value of the first Operand is null, the operator returns the value of the second Operand, otherwise it returns the value of the first Operand. The following example demonstrates this:

Using System

Namespace CalculatorApplication

{

Class NullablesAtShow

{

Static void Main (string [] args)

{

Double? Num1 = null

Double? Num2 = 3.14157

Double num3

Num3 = num1 5.34; / / num1 returns 5.34 if it is null

Console.WriteLine ("value of num3: {0}", num3)

Num3 = num2 5.34

Console.WriteLine ("value of num3: {0}", num3)

Console.ReadLine ()

}

}

}

When the above code is compiled and executed, it produces the following results:

The value of num3: the value of 5.34num3: 3.14157 so far, I believe you have a deeper understanding of "how to use the Null merge operator of C#". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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