var keyword in C#
Keywords are the words in a language that are used for some internal process or represent some predefined actions. var is a keyword, it is used to declare an implicit type variable, that specifies the type of a variable based on initial value.
Syntax:
var variable_name = value;
Example:
Input: a = 637 b = -9721087085262 Output: value of a 637, type System.Int32 value of b -9721087085262, type System.Int64 Input: c = 120.23f d = 150.23m e = G f = Beginner Output: value of c 120.23, type System.Single value of d 150.23, type System.Decimal value of e G, type System.Char value of f Beginner, type System.String
Example 1:
// C# program for var keyword using System; using System.Text; class GFG { static void Main( string [] args) { var a = 637; var b = -9721087085262; // to print their type of variables Console.WriteLine( "value of a {0}, type {1}" , a, a.GetType()); Console.WriteLine( "value of b {0}, type {1}" , b, b.GetType()); } } |
Output:
value of a 637, type System.Int32 value of b -9721087085262, type System.Int64
Example 2:
// C# program for var keyword using System; using System.Text; namespace Test { class GFG { static void Main( string [] args) { var c = 120.23f; var d = 150.23m; var e = 'G' ; var f = "Beginner" ; // to print their type of variables Console.WriteLine( "value of c {0}, type {1}" , c, c.GetType()); Console.WriteLine( "value of d {0}, type {1}" , d, d.GetType()); Console.WriteLine( "value of e {0}, type {1}" , e, e.GetType()); Console.WriteLine( "value of f {0}, type {1}" , f, f.GetType()); // hit ENTER to exit Console.ReadLine(); } } } |
Output:
value of c 120.23, type System.Single value of d 150.23, type System.Decimal value of e G, type System.Char value of f Beginner, type System.String