Console I/O Functions

Input/output

The information we put into a computer is called input and the information we're given from the computer is called output.

There is no keyword available in c for doing input/output or I/O, all I/o in c is done by using standard library function. there are several function library is available for performing input/output.

I/O library function can be classified into two broad categories

1). Console I/O functions

Function to receive input from the keyboard and write output usually on the computer screen.

2). File I/O function

Function to perform I/O operations on a hard disk.

Here we are going to discussing on console i/o function only. The file i/o functions would be discussed in other computer.

Console I/O Functions

As we discuss above function to receive input from keyboard and write output on screen. The screen and keyboard together called a console.

Console I/O function can be further classified into two categories formatted and unformatted console i/o functions.

1). Formatted Functions

Data type	Input	Output
Char   int float string	scanf()	printf()

2). Unformatted Functions

Data type	Input	Output
char	getch()   getche() getchar()	putch()   putchar()
int   float	---	---
string	gets()	puts()