C# - 算術運算子

下表顯示了 C# 支援的所有算術運算子。假設變數A 為 10，變數B 為 20，則：

運算子	描述	示例
+	將兩個運算元相加	A + B = 30
-	從第一個運算元中減去第二個運算元	A - B = -10
*	將兩個運算元相乘	A * B = 200
/	將分子除以分母	B / A = 2
%	取模運算子，返回整數除法後的餘數	B % A = 0
++	自增運算子將整數的值增加一	A++ = 11
--	自減運算子將整數的值減少一	A-- = 9

示例

以下示例演示了 C# 中可用的所有算術運算子：

線上演示

using System;

namespace OperatorsAppl {
   class Program { 
      static void Main(string[] args) { 
         int a = 21;
         int b = 10;
         int c;

         c = a + b;
         Console.WriteLine("Line 1 - Value of c is {0}", c);
         
         c = a - b;
         Console.WriteLine("Line 2 - Value of c is {0}", c);
         
         c = a * b;
         Console.WriteLine("Line 3 - Value of c is {0}", c);
         
         c = a / b;
         Console.WriteLine("Line 4 - Value of c is {0}", c);
         
         c = a % b;
         Console.WriteLine("Line 5 - Value of c is {0}", c);
         
         c = a++;
         Console.WriteLine("Line 6 - Value of c is {0}", c);
         
         c = a--;
         Console.WriteLine("Line 7 - Value of c is {0}", c);
         Console.ReadLine();
      }
   }
}

編譯並執行上述程式碼後，將產生以下結果：

Line 1 - Value of c is 31
Line 2 - Value of c is 11
Line 3 - Value of c is 210
Line 4 - Value of c is 2
Line 5 - Value of c is 1
Line 6 - Value of c is 21
Line 7 - Value of c is 22

csharp_operators.htm

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