Getting Started with C # basics-Variable Introduction

Source: Internet
Author: User
This paper mainly introduces the basic knowledge of variables in C #, and has a good reference value. Let's take a look at the little series.

Use variables in 3 steps: Declare, assign, use.

Syntax for declaring variables: data type variable name;

syntax for assigning a variable: variable name = value;


Namespace Test{class Program {  static void Main (string[] args)  {   int age;//declare variable, type int, variable name age   = 18 ;//Assign the variable   age to Console.WriteLine ("I Am" +age= "year");//print Ages   = 19;//Modify the value of the variable age   Console.WriteLine ("I "+age+");//Print Age  }}}

The result of the operation is:

The Declaration and assignment of a variable can be done at the same time, the first two lines in the main () method of the above code can be rewritten as:

int age=18;//声明并赋值

Exercises:


static void Main (string[] args) {int age;//age =-20; Console.WriteLine ("I am {0} years old this year", age); age = age-2;}

This code prints: I'm 21 years old.

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