# C Program to Find Area Of Rectangle

In this tutorial, i am going to show you how to find the area of rectangle with the help of formula, function and pointers in c programs.

## All C Programs and Algorithm to Find Area Of Rectangle

• Algorithm to Find Area Of Rectangle
• C Program to Find Area Of Rectangle using Formula
• C Program to Find Area Of Rectangle using Function
• C Program to Find Area Of Rectangle using Pointer

### Algorithm to Find Area Of Rectangle

Just follow the below given algorithm to write a program to find area of rectangle; as follows:

1. Take input length and width of rectangle. Store it in two different variables.
2. Calculate area of rectangle using `area = length * width`.
3. Finally, print the value of area of rectangle.

### C Program to Find Area Of Rectangle using Formula

```#include<stdio.h>
int main()
{

printf("enter length of rectangle: ");
scanf("%f",&length);

printf("Area of Rectangle: %f\n",area);
return 0;
}```

The result of the above c program; as follows:

```enter length of rectangle: 10
Area of Rectangle: 300.000000```

### C Program to Find Area Of Rectangle using Function

```#include<stdio.h>
float area(float l,float b)
{
return (l*b);
}

int main()
{

float l,b,a;

printf("enter length of rectangle: ");
scanf("%f",&l);

scanf("%f",&b);

a=area(l,b);
printf("Area of Rectangle: %f\n",a);
return 0;
}```

The result of the above c program; as follows:

```enter length of rectangle: 50
Area of Rectangle: 1250.000000```

### C Program to Find Area Of Rectangle using Pointer

```#include<stdio.h>
void area(float *l,float *b,float *area)
{
*area=((*l)*(*b));
}

int main()
{

float l,b,a;

printf("enter length of rectangle: ");
scanf("%f",&l);

scanf("%f",&b);

area(&l,&b,&a);
printf("Area of Rectangle: %f\n",a);
return 0;
}```

The result of the above c program; as follows:

```enter length of rectangle: 55