无涯教程-C# - nested if 语句函数在C#中，嵌套if-else语句始终是合法的，这意味着您可以在另一个

在C#中，嵌套if-else语句始终是合法的，这意味着您可以在另一个if或else if语句中使用一个if或else if语句。

nested if statements - 语法

嵌套if语句的语法如下所示:-

if( boolean_expression 1) {
   /* 当布尔表达式 1 为真时执行 */
   if(boolean_expression 2) {
      /* 当布尔表达式 2 为真时执行 */
   }
}

using System;
namespace DecisionMaking {
class Program {
static void Main(string[] args) {
//* 局部变量定义 */
int a=100;
int b=200;
     </span><span class="com">/* 检查布尔条件 */</span><span class="pln">
     </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">a </span><span class="pun">==</span><span class="pln"> </span><span class="lit">100</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        
        </span><span class="com">/* 如果条件为真，则检查以下内容 */</span><span class="pln">
        </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">b </span><span class="pun">==</span><span class="pln"> </span><span class="lit">200</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
           </span><span class="com">/* 如果条件为真，则打印以下内容 */</span><span class="pln">
           </span><span class="typ">Console</span><span class="pun">.</span><span class="typ">WriteLine</span><span class="pun">(</span><span class="str">"Value of a is 100 and b is 200"</span><span class="pun">);</span><span class="pln">
        </span><span class="pun">}</span><span class="pln">
     </span><span class="pun">}</span><span class="pln">
     </span><span class="typ">Console</span><span class="pun">.</span><span class="typ">WriteLine</span><span class="pun">(</span><span class="str">"Exact value of a is : {0}"</span><span class="pun">,</span><span class="pln"> a</span><span class="pun">);</span><span class="pln">
     </span><span class="typ">Console</span><span class="pun">.</span><span class="typ">WriteLine</span><span class="pun">(</span><span class="str">"Exact value of b is : {0}"</span><span class="pun">,</span><span class="pln"> b</span><span class="pun">);</span><span class="pln">
     </span><span class="typ">Console</span><span class="pun">.</span><span class="typ">ReadLine</span><span class="pun">();</span><span class="pln">
  </span><span class="pun">}</span><span class="pln">

}
}

编译并执行上述代码时，将生成以下输出-

Value of a is 100 and b is 200
Exact value of a is : 100
Exact value of b is : 200

无涯教程-C# - nested if 语句函数

nested if statements - 语法

参考链接