you have to cyt
no
Single player commands are needed.
You get a mod, such a Single Player Commands.
well minecraft 1.2.3 single player is beta so there are no commands hopefully in the next version
You dont, unless you have the single player commands mod. Which i suggest you download. That is, if you want to enter cheat codes in survival mode minecraft.
you can install Single Player Commands and there is a freecam option.
Well there are 2 waysyou can get the mod too many items and you can get every single item that exists on minecraftor you can download single player commands mod which means you have to know the numbers of minecraft items however on single player commands you can change time in day,weather and you can flyI have both but they are both great i have both because i couldnt decide
Use //set cobblestone.
do /clear inventory or just /clear
Don't... Use single player commands. One of the commands is "Fly" which, obviously, lets you fly. Another command is "Noclip" which lets you fly and go through matter.
You don't need anything. Just search SPC on the minecraft forums, and when you download it, it walks you through, and automatically downloads so you don't have to do anything.
In multiplayer, commands are generally started with a "/" Single player commands have not yet been added, unless you get a mod that has commands, like WorldEdit. They will be added in the next update, 1.3.