What about <stdio.h> i really need it in my studies??

Answer 1

stdio.h is standard input output header file used while programming a code in C language.
This header file consists of various input and output stream. Like when you need to print something on the output screen then you write printf() function which is defined in the stdio.h header file. So you don't need to write a whole function again and again. Also while taking user input we use scanf() function which is also defined in stdio.h.
You can refer the below link for more functions inside stdio.h
https://www.tutorialspoint.com/c_standard_library/stdio_h.htm

So you need to include this header file while writing any code in C.

Answer 2

It is for example used to output stuff on the screen and to take user input.

So very likely: Yes.

Answer 3

It's a header file in C. "stdio" means standard input output. "h" means header.

This file having the definition of all the input/output predefined functions.

You cannot use printf, scanf, puts, gets, etc without inclusion of this file in your program.

Before get into this file, try to complete the topics of functions, files, pointers in C.