📜  C#中的float关键字

📅  最后修改于: 2021-05-29 16:37:00             🧑  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。 float是用于声明变量的关键字,该变量可以存储从±1.5 x 10 -45到±3.4 x 10 38的范围内的浮点值。它是System.Single的别名。

句法:

float variable_name = value;

float关键字在内存中占用4个字节(32位)的空间。我们使用带有值的后缀fF表示浮点值。

例子:

Input: -3629.4586F

Output: num: -3629.458
        Size of a float variable: 4

Input: 16345.6456f

Output: Type of num: System.Single
        num: 16345.65
        Size of a float variable: 4
        Min value of float: -3.402823E+38
        Max value of float: 3.402823E+38

范例1:

// C# program for float keyword
using System;
using System.Text;
  
class GFG {
  
    static void Main(string[] args)
    {
        // variable declaration
        float num = -3629.4586F;
  
        // to print value
        Console.WriteLine("num: " + num);
  
        // to print size
        Console.WriteLine("Size of a float variable: " + sizeof(float));
    }
}

输出:

num: -3629.458
Size of a float variable: 4

范例2:

// C# program for float keyword
using System;
using System.Text;
  
namespace geeks {
  
class GFG {
  
    static void Main(string[] args)
    {
        // variable declaration
        float num = 16345.6456f;
  
        // to print type of variable
        Console.WriteLine("Type of num: " + num.GetType());
  
        // to print value
        Console.WriteLine("num: " + num);
  
        // to print size
        Console.WriteLine("Size of a float variable: " + sizeof(float));
  
        // to print minimum & maximum value of float
        Console.WriteLine("Min value of float: " + float.MinValue);
        Console.WriteLine("Max value of float: " + float.MaxValue);
    }
}
}

输出:

Type of num: System.Single
num: 16345.65
Size of a float variable: 4
Min value of float: -3.402823E+38
Max value of float: 3.402823E+38