This document provides an overview of IAS 21, which sets out the accounting treatment for foreign currency transactions and foreign operations. It defines key terms like functional currency, foreign currency, spot exchange rate, and closing rate. The standard specifies that foreign currency transactions should be initially recorded using the spot exchange rate and revalued at each reporting date using the closing rate for monetary items. Exchange differences arising from such revaluations should be recognized in profit or loss. It also addresses how to determine functional currency and the translation of financial statements into a presentation currency.