COMPLEC

a self-contained block of statements that can be executed repeatedly whenever we need it

The system provided these functions and stored in the library.

These functions are defined by the user at the time of writing the program

This informs compiler about the function name, function parameters and return value’s data type

This calls the actual function

This contains all the statements to be executed

The actual parameter is passed to a function

Instead of copying variable; an address is passed to function as parameters

a variable that can store multiple values

Structures of related data items

a sequence of characters terminated with a null character \0

scanf of strings

printf of strings

string reader that only reads the characters

string reader that reads also the null \0