Operating Income/Loss is the the difference between a company's revenue and expenses, excluding income from sources other than its regular activities and before income deductions.
Operating loss is negative operating income. Operating Income/Loss is synonymous with net operating profit (or loss), operating income (or loss), and net operating income (or loss).
The formula is Operating Income/Loss = Net Revenue - Operating Expenses - Depreciation - Amortization
'Operating Income/Loss measures a company's earning power from ongoing operations. It does not include earnings from non operating operations and the interest and income tax expenses.