Implicitly Typed Local Variables

In C#, we can create local variable without specifying its type. The C# var keyword is used to create implicit typed local variables. The C# compiler infers the types of variable on the basis of assigned value.

The var keyword can be used in following context.

✅ To create local variables inside a method block.
✅ In loop construct to initialize variable.
✅ In using statement to store resource reference.

The var keyword has following restrictions.

✅ It should use to declare and initialize local variable in the same statement.
✅ It cannot be used to declare class variables.
✅ It cannot be used to initialize multiple implicitly-typed variables in the same statement.
✅ It cannot be used in initialization expression. Ex. var a = (a=220);

Let's see an example. Here, we have created integer, string and array type local variables.

C# Implicit Typed Local Variable Example

Example


using System;
namespace CSharpFeatures
{
    class ImplicitTypedExample
    {
        public static void Main()
        {
            // integer
            var a = 20;
            // string
            var s = "Hello World";
            // array
            var arr = new[] { 1,2,3};  
            Console.WriteLine(a);
            Console.WriteLine(s);
            Console.WriteLine(arr[2]);
        }
    }
}

Output:

Output


20
hello world
3

C# Implicit Typed Local Variable Example

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