9.14. Swift nested if statement

In the Swift language, you can use a if or else if use another within the statement if or else if statement.

9.14.1. Grammar #

Nesting in Swift language if syntax of the statement:

if boolean_expression_1 {
   /* when boolean_expression_1 execute when expression is true */
   if boolean_expression_2 {
      /* when boolean_expression_1 execute when expression is true */
   }
}

You can nest else if...else , mode and nesting if the sentence is similar.

9.14.2. Example #

import Cocoa

var varA:Int = 100;
var varB:Int = 200;

/* Detect Boolean conditions */
if varA == 100 {
   /* If the condition is true, execute the following statement */
   print("The first condition is true");

   if varB == 200 {
      /* If the condition is true, execute the following statement*/
      print("The second condition is also true");
   }
}
print("The value of the varA variable is \(varA)");
print("The value of the varB variable is \(varB)");

When the above code is compiled and executed, it produces the following results:

The first condition is true
The second condition is also true
The value of the varA variable is 100
The value of the varB variable is 200