Enum is used to define a human-readable name for a specify number or string. The method to use an enum is to put its value into the switch statement. The below program will determine whether a light is on or off using Enum.
enum LightSwitch {
On,
Off
}
The above enum has two values, the on and off state for a light switch.
function lightOnOff(state : LightSwitch) {
switch(state) {
case LightSwitch.On:
console.log("Light's On!")
break
case LightSwitch.Off:
console.log("Light's Off!")
break
}
}
lightOnOff(LightSwitch.On) /* Light's On! */
lightOnOff(LightSwitch.Off) /* Light's Off! */
As the user entered the type LightSwitch enum value (on or off) into the above function, the switch statement will print the state of the light switch accordingly.
