> miner.start()
null
> eth.blockNumber
0
> eth.blockNumber
5
> eth.blockNumber
42
> eth.getBalance(eth.accounts[0])
210000000000000000000
> eth.getBalance(eth.accounts[1])
0

ETH で残高を表示
> web3.fromWei(eth.getBalance(eth.accounts[0]), 'ether')
210