## Introduction :

This is a quick beginner level C programming question. We will learn how to calculate the area of a rectangle using user input values. Our program will ask the user to enter the *height* and *width* of the rectangle. It will calculate the area and print out the result.

With this program, you will learn how to read user inputs, how to do mathematical calculations and how to print values in C programming language.

### C program :

```
#include<stdio.h>
int main()
{
float length, breadth, area;
printf("Enter the length of the rectangle : ");
scanf("%f", &length);
printf("Enter the breadth of the rectangle : ");
scanf("%f", &breadth);
area = length * breadth;
printf("Area : %.2f\n", area);
}
```

### Explanation :

*length*,*breadth*and*area*are three variables initialized to hold the*length*,*breadth*and*area*of the rectangle. These are all floating point variables.- Ask the user to enter the
*length*of the rectangle. Read it and store it in variable*length*. We are using*%f*in*scanf*because this is a*float*value we are reading the user input. - Ask the user to enter the
*breadth*of the rectangle. Read it and store it in variable*breadth*. - Calculate the
*area*by multiplying*length*and*breadth*. - Print the
*area*variable to the user. Note that we are using*%.2f*to print it. This is because*%.2f*will put only two numbers to the right of the decimal point.

### Sample output :

```
Enter the length of the rectangle : 10
Enter the breadth of the rectangle : 10
Area : 100.00
Enter the length of the rectangle : 12
Enter the breadth of the rectangle : 8.5
Area : 102.00
```