C Program To Find Area And Perimeter of Rectangle (original) (raw)

Last Updated : 16 Sep, 2022

Here, we will find the area and perimeter of rectangle using a C Program as follows:

Example:

Input:

l = 10 b = 10

Output:

area = 100 perimeter = 40

Explanation:

The formula for the area of a rectangle is

Area = lengthbreadth => lb

The formula for the perimeter of a rectangle is

Perimeter = 2*(length + breadth) => 2*(l+b)

Method 1:

C `

// C program to demonstrate the // area and perimeter of rectangle #include <stdio.h>

int main() {

int l = 10, b = 10;
printf("Area of rectangle is : %d", l * b);
printf("\nPerimeter of rectangle is : %d", 2 * (l + b));
return 0;

}

`

Output

Area of rectangle is : 100 Perimeter of rectangle is : 40

Method 2:

C `

// C program to demonstrate the // area and perimeter of rectangle #include <stdio.h>

int main() {

int l = 10, b = 10;
int A, P;
A = l * b;
P = 2 * (l + b);
printf("Area of rectangle is : %d", A);
printf("\nPerimeter of rectangle is : %d", P);
return 0;

}

`

Output

Area of rectangle is : 100 Perimeter of rectangle is : 40

Method 3: Using functions

C `

// C program to demonstrate the // area and perimeter of rectangle // using function #include <stdio.h>

int area(int a, int b) { int A; A = a * b; return A; } int perimeter(int a, int b) { int P; P = 2 * (a + b); return P; }

int main() {

int l = 10, b = 10;
printf("Area of rectangle is : %d", area(l, b));
printf("\nPerimeter of rectangle is : %d",
       perimeter(l, b));
return 0;

}

`

Output

Area of rectangle is : 100 Perimeter of rectangle is : 40