Switch Statements

The Switch statement is a control flow structure that allows a program to execute different code blocks based on the value of an expression.

Syntax

switch (expression) {
  case value1:
    // code block executed if the expression matches value1
    break;
  case value2:
    // code block executed if the expression matches value2
    break;
  //Additional cases as needed
  default:
    // code block executed if no case matches the expression
}

• expression: The value or variable being evaluated.
• case: Specifies a value to be compared with the expression.
• break: Terminates the switch statement, preventing fall-through to subsequent cases.
• default: Optional. Specifies code to be executed if none of the cases match the expression.

Example

In the following example, the switch statement is used to determine and print a message based on the value of the fruit variable:

void main() {
  String fruit = 'apple';

  switch (fruit) {
    case 'banana':
      print('You chose a banana!');
      break;
    case 'apple':
      print('You chose an apple!');
      break;
    case 'orange':
      print('You chose an orange!');
      break;
    default:
      print('Invalid fruit selection');
  }
}

The corresponding case is executed if the value is banana, apple, or orange. If none of the cases match, the default block is executed, printing an error message.