# C Program To Find Area of Rectangle

In this article, we are going to write a c program to find area of rectangle.

We will make this program in the following way -:

• C Program To Find Area of Rectangle (Simple Way)
• C Program To Find Area of Rectangle Using Function
• C Program To Find Area of Rectangle Using Pointer
• C Program To Find Area of Rectangle Using Macro

To make this program, we will use the following concept given below.

If you do not know about these topics well, then you may not understand this program, so you should know about them in detail from the link given above.

Now without wasting time let’s start programming.

## C Program To Find Area of Rectangle (Simple Way)

Algorithm

• Program Start
• Declare Variables
• Input length and breadth From User
• Calculate Area of Rectangle
• Display Result
• Program End

Program

``````//C Program To Find Area of Rectangle

#include<stdio.h>
void main()
{
float l,b,area;

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

scanf("%f",&b);

area=(l*b);
printf("Area of Rectangle : %f\n",area);

}``````

Output

``````Enter length of rectangle: 10
Area of Rectangle : 120.000000``````

## C Program To Find Area of Rectangle Using Function

Algorithm

• Program Start
• Declare Variables
• Input length and breadth From User
• Calling Function To Calculate Area of Rectangle
• Calculating Area of rectengle
• Display Result
• Program End

Program

``````//C Program To Find Area of Rectangle Using Function

#include<stdio.h>
void aor(float l, float b);
void main()
{
float l,b;

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

scanf("%f",&b);

aor(l,b);
}
void aor(float l, float b)
{
float area;

area = (l*b);

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

Output

``````Enter length of rectangle: 3
Area of Rectangle : 15.000000``````

## C Program To Find Area of Rectangle Using Pointer

Program

``````//C Program To Find Area of Rectangle Using Pointer

#include<stdio.h>
void aor(float *l, float *b);
void main()
{
float l,b;

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

scanf("%f",&b);

aor(&l,&b);
}
void aor(float *l, float *b)
{
float area;

//here l and b is a pointer variable
area = (*l)*(*b);

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

Output

``````Enter length of rectangle: 30
Area of Rectangle : 45.000000``````

## C Program To Find Area of Rectangle Using Micro or #Define

Program

``````//C Program To Find Area of Rectangle Using #define

#include<stdio.h>
#define area(l,b) (l*b)
void main()
{
float l,b,area;

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

scanf("%f",&b);

printf("Area of Rectangle : %f\n",area(l,b));

}
``````

Output

``````Enter length of rectangle: 30
Area of Rectangle : 150.000000``````

## Conclusion

So friends, in this article, we have written a c program to find area of Rectangle in this ways -:

• C Program To Find Area of Rectangle (Simple Way)
• C Program To Find Area of Rectangle Using Function
• C Program To Find Area of Rectangle Using Pointer
• C Program To Find Area of Rectangle Using Macro

If you have difficulty to understand any program or have any doubts or questions, then tell me in the comment below.

Jeetu Sahu is A Web Developer | Computer Engineer | Passionate about Coding, Competitive Programming, and Blogging