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eth_getBalance

Returns balance of the given account
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web3.eth.getBalance(address [, defaultBlock] [, callback])

Parameters

1、The address to get the balance of.
2、(optional) If you pass this parameter it will not use the default block set with web3.eth.defaultBlock. Pre-defined block numbers as "earliest","latest" and "pending" can also be used.
3、(optional) Optional callback, returns an error object as first parameter and the result as second.

Returns

The current balance for the given address in wei.

Example

> web3.eth.getBalance("0x063eBCD1dB02320814Acc0721e65f14b8755Ff41").then(console.log)
> 98999296192000000000