# Conventions Function declarations, function names, type declarations, filenames, directory names and library names are shown in a different font. For example: `#include` Commands and code samples appear in a specially formatted code section. For example: output = (input - offset) * scale. Copy to clipboard Mathematical expressions appear in a specially formatted math section. For example: \[y = x + 1\] Environment variables appear preceded by $, for example ${SDK\_ROOT}. Last Published: Oct 02, 2025 [Previous Topic Introduction](https://docs.qualcomm.com/bundle/publicresource/80-63442-100/topics/introduction.md) [Next Topic Revision History](https://docs.qualcomm.com/bundle/publicresource/80-63442-100/topics/revision_history.md)