Apex - nested if statement

We can also have the nested if-else statement for complex condition as given below −

Syntax

if boolean_expression_1 {
   /* Executes when the boolean expression 1 is true */
   if boolean_expression_2 {
      /* Executes when the boolean expression 2 is true */
   }
}

Example

String pinCode = '12345';
String customerType = 'Premium';
if (pinCode == '12345') {
   System.debug('Condition met and Pin Code is'+pinCode);
   if(customerType = 'Premium') {
      System.debug('This is a Premium customer living in pinCode 12345');
   }else if(customerType = 'Normal') {
      System.debug('This is a Normal customer living in pinCode 12345');
   }
}else {
   //this can go on as per the requirement
   System.debug('Pincode not found');
}

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