D编程 nested if statements

2021-09-01 11:23 更新

在D编程中,嵌套if-else语句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 - 语法

嵌套if语句的语法如下所示:-

if( boolean_expression 1) { 
   /* Executes when the boolean expression 1 is true */
   if(boolean_expression 2) { 
      /* Executes when the boolean expression 2 is true */
   }
}

nested if - 示例

import std.stdio;
 
int main () { 
   /* local variable definition */
   int a=100; 
   int b=200; 
  
   /* check the boolean condition */
   if( a == 100 ) { 
      /* if condition is true then check the following */
      if( b == 200 ) { 
         /* if condition is true then print the following */
         writefln("Value of a is 100 and b is 200" ); 
      } 
   } 
   writefln("Exact value of a is : %d", a ); 
   writefln("Exact value of b is : %d", b ); 
  
   return 0; 
}

编译并执行上述代码时,将生成以下结果-

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


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