C Input and Output

In programming input means reading data from the input devices or from a file. Output means displaying results on the screen. C provides number of input and output functions. These input and output functions are predefined in their respective header files. Header file for standard input and output functions is stdio.h. These are included into program prefixed with #include statement. Input and Output functions are classified into 2 categories. Decision making statements (or) Control statements are used to check the condition, if the condition is true it will executes a block of statements.