8.1 Built-in Functions

Built-in functions are always available for your awk program to call. This section defines all the built-in functions in awk; some of these are mentioned in other sections but are summarized here for your convenience.

• Calling Built-in: How to call built-in functions.
• Numeric Functions: Functions that work with numbers, including int, sin and rand.
• String Functions: Functions for string manipulation, such as split, match and sprintf.
• I/O Functions: Functions for files and shell commands.
• Time Functions: Functions for dealing with timestamps.
• Bitwise Functions: Functions for bitwise operations.
• I18N Functions: Functions for string translation.