var i; how many values return?

Question

This question confused me. please help me in exact way....

Vulpes · Answer

I'm not surprised that it confused you since: var i; doesn't return any values at all. It's simply a variable declaration. Moreover it's not even valid C# syntax except in the very unusual circumstance that you have a class or struct called 'var' in scope within your application. In that case it declares 'i' to be a variable of the 'var' type. The much more usual use of 'var' is to declare a local variable's type implicitly. The compiler infers the type of the variable by working out the type of the expression on the right hand side of the '=' sign. For example: var i = 3; // 'i' inferred to be of type int var j = true; // 'j' inferred to be of type bool var k = new MyType(); // 'k' inferred to be of type MyType Clearly some expression needs to be assigned to the variable for the compiler to be able to infer the type. Notice that the variable is still 'strongly' typed i.e. you can't then assign an expression of a different type to it. For example this is illegal: i = 2.5; // illegal 'i' is of type int not double.

Arunava Bhattacharjee · Answer

Vulpes gave you the answer. It's not valid in C#. var i =new List () means i is a type of List and var i=new Person() means it is a type of Person.

Jignesh Trivedi · Answer

hi Var keyword define type of variable implicit. An implicitly typed local variable is strongly typed just as if you had declared the type yourself but the compiler determines the type Please refer http://msdn.microsoft.com/en-us/library/bb383973.aspx http://www.dotnetperls.com/var Agree with Vulpes Var I; does not return anything but it gives compilation error.... hope this will help you.