From ComputerCraft Wiki
|Attempts to dig the block below the turtle. If successful, suck() is automatically called, placing the item in turtle inventory in the selected slot if possible (block type matches and the slot is not a full stack yet), or in the next available slot.|
When using a hoe, if the space beneath the turtle consists of air and the space beneath that is dirt, then the turtle may till that dirt by use of this function.
|Returns||boolean whether the turtle succeeded in digging, string error message|
|Attempts to dig the block below the turtle.|
|Output||true if the turtle could dig the block, false if it could not or no block present.|