Зачем нужны false и True.

Question

Я в течение долгих дней не могу понять зачем нужны false и True.

Answer 1

There are a lot of properties that are either true of false.

IsActive
IsOpen

Based on the value of these variables decission can be made.

If (door.IsOpen)
{
//walkthrough
}
else
{
//get key
//unlock lock
//open door
//walk through
}

Which language do you use ?

Booleans although limited do have their purpose.