📜  C#中的无效关键字

📅  最后修改于: 2021-05-30 00:27:52             🧑  作者: Mango

关键字是用于某些内部过程或表示某些预定义动作的语言中的单词。 void是关键字,它是数据类型的引用类型,用于指定C#中方法的返回类型。它是System.Void的别名。

句法:

public void function_name([parameters])
{
    //body of the function
}

注意:如果C#方法中没有参数,则void不能用作参数。

例子:

Input: Geeks
       multi = 50*20

Output: Geeks
        multi = 1000

Output: GeeksforGeeks
        sum = 80+20
        sub = 40-10

Output: GeeksforGeeks
        sum = 100
        sub = 30

范例1:

// C# program for void keyword
using System;
class GFG {
  
    public void SimpleText()
    {
        Console.WriteLine("Geeks");
    }
  
    public void sum(int a, int b)
    {
        Console.WriteLine("multi = " + (a * b));
    }
};
  
class Prog {
  
    static void Main(string[] args)
    {
        // calling functions
        GFG ex = new GFG();
        ex.SimpleText();
        ex.sum(50, 20);
    }
}

输出:

Geeks
multi = 1000

范例2:

// C# program for void keyword
using System;
using System.Text;
  
namespace Test {
  
class Sample {
  
    public void SimpleText()
    {
        Console.WriteLine("GeeksforGeeks");
    }
  
    public void sum(int a, int b)
    {
        Console.WriteLine("sum = " + (a + b));
    }
  
    public void sub(int c, int d)
    {
        Console.WriteLine("sub = " + (c - d));
    }
};
  
class Prog {
  
    static void Main(string[] args)
    {
        // calling functions
        Sample ex = new Sample();
        ex.SimpleText();
        ex.sum(80, 20);
        ex.sub(40, 10);
  
        // hit ENTER to exit
        Console.ReadLine();
    }
}
}

输出:

GeeksforGeeks
sum = 100
sub = 30