scanf() Function

scanf() Function

scanf() function is used to get the value from print screen.  Every function has return some value after execution of functions. scanf() function also has return values which was either 0 or 1. while execute scanf() function its check whether the values are correct or not. If that value is correct mean it return 1 otherwise it return 0.

example:

User input integer value but program assign character variable. In this section character variable getting integer input integer value so this statement is false, So scanf() function is return 0. because it false. 

Example Program

#include<stdio.h>

#include<conio.h>

void main ( )

{

char c ;

clrscr ( );

c=scanf( " %c" , &c );
printf("%c",c);

getch ( );

}

Explanation:

1. Compiler first read header file after that enter main function.
2. Scanf() function is read the input from the user. 
3. Variable c was get the return value of scanf() function. The return value is either 0 or 1. 
4. Printf() function will print the value either 0 or 1. Its based on return value of scanf();
5. end of file 

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