gawk: Functions
9 Functions
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This major node describes 'awk''s built-in functions, which fall into
three categories: numeric, string, and I/O. 'gawk' provides additional
groups of functions to work with values that represent time, do bit
manipulation, sort arrays, provide type information, and
internationalize and localize programs.
Besides the built-in functions, 'awk' has provisions for writing new
functions that the rest of a program can use. The second half of this
major node describes these "user-defined" functions. Finally, we
explore indirect function calls, a 'gawk'-specific extension that lets
you determine at runtime what function is to be called.
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