Gross profit refers to the main business income minus the main business cost. Look at the profitability of major business projects. Net profit is the after-tax profit of all profits and losses. See how much money you've made.
Gross profit = revenue-cost
Net profit = revenue-cost-expense
A. how to become a senior Java engineer
First, find an introductory book about android. This is easy to handle. Most books on the market are introductory books.