Search results
A var cannot be set to null since it needs to be statically typed. var foo = null; // compiler goes: "Huh, what's that type of foo?" However, you can use this construct to work around the issue: var foo = (string)null; // compiler goes: "Ah, it's a string. Nice." I don't know for sure, but from what I heard you can also use dynamic instead of ...
21 cze 2023 · In a declaration statement, you can also initialize a variable with its initial value: int a = 3, b = 2, c = a + b; The preceding examples explicitly specify the type of a variable. You can also let the compiler infer the type of a variable from its initialization expression. To do that, use the var keyword instead of a type's name.
13 mar 2023 · The var keyword instructs the compiler to infer the type of the variable from the expression on the right side of the initialization statement. The inferred type may be a built-in type, an anonymous type, a user-defined type, or a type defined in the .NET class library.
10 kwi 2024 · In an implicitly typed variable, the type of the variable is automatically deduced at compile time by the compiler from the value used to initialize the variable. The implicitly typed variable concept is introduced in C# 3.0.
14 maj 2024 · Learn how to use object initializers to initialize type objects in C# without invoking a constructor. Use an object initializer to define an anonymous type.
var can be used to declare any built-in data type or a user-defined type or an anonymous type variable. The following example shows C# compiler infers type based on the value: var i = 10; Console.WriteLine("Type of i is {0}", i.GetType()); var str = "Hello World!!"; Console.WriteLine("Type of str is {0}", str.GetType()); var dbl = 100.50d;
Starting from C# 3, you can use the var keyword to declare implicit-typed variables. For example, the following declares a variable and initializes its value as a literal string: string message = "Hi" ; Code language: C# ( cs )
