in case of <stdio.h>  this will be checking only the folder
containing  C compiler...... as we will be describing the
path in the directories option in the IDE.....


in case of "stdio.h"  this will be checking the entire hard
disk there by deleting the path given in the directories
explicitly .....


thank u

When we use #include<stdio.h>, the compiler will look at the
compiler's directory for stdio.h file and then include it.
When we use #include"stdio.h", it will look in the source
code's directory for the stdio.h file.

"" are basically used when the header file is placed with
the source code(means .c or .cpp files), not in the C
Compiler's 'include' directory. It is basically used to
include our own self generated header files into our program.