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printf() and scanf() function in C Programming

printf() and scanf() are the library functions defined in stdio.h header file.
if we are using printf and scanf in our program we should use stdio.h header file.

printf()

printf() function is used to print the “character, string, float, integer, octal and hexadecimal values” onto the output screen.

Symbol and its functions

Symbol	Function
%d	Prints Integer
%f	Prints float and double
%c	Prints Character
%s	Prints String
%o	Prints Octal Value
%u	Prints unsigned integer
%x	Prints hexadecimal value

c program to print "hello world"

       #include<stdio.h>
       main(){
           printf("hello world");
       }

Output: hello-world

scanf()

scanf() function is used to input the “character, string, float, integer, octal and hexadecimal values” from the keyboard.