what is the line include stdio.h at the top of a C source file for

what is the line


#include<stdio.h>

at the top of a C source file for?

In the case of our first few programs, it lets the compiler know some important information aboutthe library function,
printf
. It also lets the compiler know similar information about otherfunctions in the “Standard I/O library,” some of which we’ll be learning about later. (It also proides a few I/O!related definitions which
we’ll 
 be using later.” #e’ll learn more about the
#include
 directie when we coer the $ %reprocessor in a few weeks
on May 17, 2020.
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