JavaScript in Practice: Getting Started/

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Switch statements

Switch statements

Learn how to execute selective instructions using switch statement.

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There is an abbreviated version for a long chain of if-else statement: the switch operator. Switch is like a telephone operator. It puts you through some code in case the correct value is stored in your variable. There is also a default line, saying “the number you have dialed is invalid”.

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function logLampColor( state ) {
  switch( state ) {
    case 1:
      console.log( 'Red' );
      break;
    case 2:
      console.log( 'Yellow' );
      break;
    case 3:
      console.log( 'Green' );
      break;
    default:
      console.log( 'Wrong lamp state' );
                }
}
logLampColor( 1 );

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