input and output function in c programming

Input..

• In any programming language input means to feed some data into program. 
• it can be given in the form of file or from command line.
•  C programming language provides a set of built-in functions to read given input and feed it to the program as per requirement.

Output...

• In any programming language output means to display some data on screen, printer or in any file.
•  C programming language provides a set of built-in functions to output required data. 
• Rest of the functions are given into C - Built-in Functions

printf() function

• This is one of the most frequently used functions in C for outpput print.

             exaple for printf() function.

                   #include <stdio.h>
                          int main()
                    {
                          // printf() displays the string inside quotation
                     printf("Hello, World!");
                      return 0;
                       }

here, printf ("hello world is printing statement")

scanf() functionThis is the function which can be used to to read an input from the command li

• include <stdio.h>
• int main()
• {
• int a=0,b=0,sum=0; // declare three variables.
• printf("Enter two numbers..." ...
• scanf("%d%d",&a,&b); // reads two integers through keyboard.
• sum=a+b; // calculate the sum.
• printf("The sum is %d",sum); // prints the sum.
• return 0;
• }

here scanf is scaning function which is give to user no.