Variables

A variable is a storage location in the computer’s memory that is used to save, retrieve, and manipulate data.

Syntax

Minimally, a variable is declared by specifying a data type and a name:

type name;

In this case, the variable will be initialized with the default value for its type: zero for numeric types, and null for reference types.

A variable can also be initialized with a value when it is declared:

type name = value;

In this case, the variable name will be set to the value value.

Note: value must be of type type or be able to be implicitly converted to type.

Example

using System;

public class Example
{
  public static void Main(string[] args)
  {
    int x = 1;
    int y = x + 5;
    long z = y;

    Console.WriteLine("The int {0} can be implicitly converted to the long {1}.", y, z);

    // Output: "The int 6 can be implicitly converted to the long 6."
  }
}