Basic function and operator used in C programming

1. What are input statement in C ?

Input statement are used to input the data from the user .some important input function are as the follows :

(a).  getchar () : This function is used to input a character from the user .

 Syntax :   character variable name = getchar () ;

(b).  gets () :  This function is used to input string from the user .

Syntax :      string (" character variable name ") ;

                    gets (" character variable name ") ;

(c). scanf () :  This is used to input any types of function.

Syntax :   scanf ("format specifier", & variable name )

2. What are output statement in c ?

Output statement are used to print the data on the output screen.some important function are as follows.

(a). Putchar () :  This function is used to output a character on the screen.

Syntax :  putchar (" character variable ") ;

(b).  puts ()  :  This function is used to displays string on the output screen.

Syntax :  puts (" string variable name")

(c). printf ()  :  This function is used to displays any types of data on the output screen.

Syntax :  printf (" any statement ")
                  or
               printf (" format specifiers ", variable name ) ;

3. what are extension of operating system ?

Ms word = .doc

Ms excel = .xls

Ms powerpoint = .ppt

C files = .c

c++ files = .ccp

database = .dbf

4. What are different keys used in C programming?

ALT + F = Find

ALT + F9 = compile

ALT + S = Save

ALT + F5 = Full or Short 

Flash + N = New Line

Ctrl + F9 = Run

Void main () :  To return not any value

clrscr () ;  This function is used to clear the screen.