Return values of printf() and scanf() in C/C++

What values do the printf() and scanf() functions return ? 
 

printf() : It returns total number of Characters Printed, Or negative value if an output error or an encoding error 
Example 1: The printf() function in the code written below returns 6. As 'CODING' contains 6 characters.
 

While printing CODING, the value returned by printf() is : 6

Example 2: The printf() function in the code written below returns 9. As '123456789' contains 9 characters.
 

While printing 123456789, the value returned by printf() is : 9

scanf() : It returns total number of Inputs Scanned successfully, or EOF if input failure occurs before the first receiving argument was assigned.
Example 1: The first scanf() function in the code written below returns 1, as it is scanning 1 item. Similarly second scanf() returns 2 as it is scanning 2 inputs and third scanf() returns 3 as it is scanning 3 inputs.
 

Input:
Hey!
welcome to
geeks for geeks


Output:
 First scanf() returns : 1
 Second scanf() returns : 2
 Third scanf() returns : 3