Assigning variables with units

In Solidity, two types of units, ether and time units, are supported for literal numbers.

Ether units supported to simplify calculations related to ether amount. All of the ether unit amounts are converted into wei. Time units are supported to simplify calculations related to time. All of the time unit numbers are converted into the number of seconds in Unix epoch time.

Specifying ether amounts using ether units

A literal number can take a suffix of wei, finney, szabo, or ether and use it to convert between the sub-denominations of ether, where ether currency numbers without a suffix are assumed to be in wei:

Suffix example	In wei
1 wei	1
1 szabo	1e12
1 finney	1e15
1 ether	1e18...