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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.