Inpu-Output functions(Unformatted)

The C environment assumes that the standard input device(keyboard) and the standard output device(Monitor) are always connected to the C environment.
Here's a list of some unformatted functions used in C along with their uses.

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Input / Output
Functions

Unformatted functions

getch()	Waits for user to press any key, returns the key pressed that can be assigned to variable
getche()	like getch() but echoes character pressed to screen
getchar()	Accepts one character from user, terminates only when user presses enter. Even if user typed more than one character return first one character only.
putchar()	can pass character type parameter, a single character that you want to appear on screen.
gets()	By passing character array as parameter can. accept string input including spaces.
puts()	By passing character array as parameter can display the content of string