C#if...else语句

using System;

namespace DecisionMaking {

   class Program {

      static void Main(string[] args) {
         /* local variable definition */
         int a = 100;

         /* check the boolean condition */
         if (a < 20) {
            /* if condition is true then print the following */
            Console.WriteLine("a is less than 20");
         } else {
            /* if condition is false then print the following */
            Console.WriteLine("a is not less than 20");
         }
         Console.WriteLine("value of a is : {0}", a);
         Console.ReadLine();
      }
   }
}

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