Printf and Scanf in C programming

 

1.There are many predefined function in the library of c.

2.printf and scanf are the predefined function.

3.They are commonly used for input and output operation.

4.printf and scanf both are predefined in stdio.h header file.

What is printf function ?

1.It is a predefined function.

2.It is used to print information or data on to the output screen.

3.It is predefined in the stdio.h header file.

4.printf is case sensitive means Printf is wrong,so it must be in lowercase.

Syntax pf printf

printf(format_specifier,variable_name);

What is scanf function ?

1.It is a predefined function.

2.It is used to take user input at the time of execution of program.

3.It is also predefined in the stdio.h header file.

4.scanf is case sensitive means Scanf is wrong,so it must be in lowercase.

printf and scanf with integer

#include<stdio.h>
int main()
{
int rollno;//declaring integer variable
printf("Enter your roll no\n");
scanf("%d",&rollno);
printf("Roll no=%d",rollno);
}

### Output ###
Enter your roll no
204
Roll no=204

printf and scanf with float

#include<stdio.h>
int main()
{
float marks;//declaring float variable
printf("Enter your marks\n");
scanf("%f",&marks);
printf("Marks=%f",marks);
}
### Output ###
Enter your marks
82.3
Marks=82.3

printf and scanf with character

#include<stdio.h>
int main()
{
char grade;//declaring character variable
printf("Enter your grade\n");
scanf("%c",&grade);
printf("Grade=%c",grade);
}
### Output ###
Enter your grade
A
Grade=A

printf and scanf with string

#include<stdio.h>
int main()
{
char name[50];//declaring character variable
printf("Enter your name\n");
scanf("%s",&name);
printf("Name=%s",name);
}
### Output ###
Enter your name
Rockey
Name=Rocky

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