2

One can search for the functions in a library by searching the internet, e.g. https://sites.google.com/site/chrowe/cs50-cheat-sheet or http://www.techonthenet.com/c_language/standard_library_functions/stdio_h/ but how can this be done in the terminal itself, since this is faster.

3

if you want to "list the functions in a library", you should look at the header file(s) aka .h file(s).

if you wanna search for functions in the standard library, you could execute

man -f keyword 

to search for man pages referenced by keyword or

man -k keyword

to search man page descriptions and names for keyword as a regular expression.

ex:

man -f print 

or

man -k print 

execute man man to learn about more options for the man command!

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