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Built-in Functions
******************

   "Built-in" functions are functions that are always available for
your `awk' program to call.  This chapter defines all the built-in
functions in `awk'; some of them are mentioned in other sections, but
they are summarized here for your convenience.  (You can also define
new functions yourself.  See User-defined Functions: User-defined.)

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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 time stamps.