C: 5. printf() and scanf()

The printf() and scanf() functions are used for input and output in C language. Both functions are inbuilt library functions, defined in stdio.h (header file).

Let's Better Understand via the following code:- 

#include<stdio.h>    

int main(){    

int x=0,y=0,result=0;  

  

printf("enter first number:");  

scanf("%d",&x);  

printf("enter second number:");  

scanf("%d",&y);  

  

result=x+y;  

printf("sum of 2 numbers:%d ",result);  

  

return 0;  

}    

Output:- 

enter first number:9

enter second number:9

sum of 2 numbers:18