levers are great for lots of things. you can open doors or close them make alarms lights hidden doors. the possibility's are endless.
check out the link to get some great ideas.
Uh, ya there no levers in minecraft pe....
the lever
Place lever on block then click on it. You will need to have a redstone linked up to it for it to do anything.
the lever
Hold shift and then right-click with the lever to place it without interacting with the chest.
A stick on top a piece of cobblestone
Your arm can be considered a first class lever.
To make a lever, place a stick above a block of cobblestone, in your crafting slot or on a crafting table.
That is an opinion and not a useful question. I prefer Minecraft, personally.
Put a stick in the middle and cobblestone below the stick.
Iron doors in Minecraft have to be open with redstone mechanics. So to open the door you would have to connect a lever, a pressure plate, or button to the door.
Not really, you can use a lever or a preesure plate but I recommend the button better.