Programming Example

Program to find area and circumference of circle.

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💻 Practical Program

📘 Step by Step Learning

In this program we will calculate area and circumference of circle.

Flow chart

Program Code

#include"stdio.h"
void main()
{
int r;
float pi = 3.14, area, circumference;

printf("enter radius of circle: \n");
scanf("%d",&r);

area = pi * r * r;
printf("area of circle=%f \n",area);

circumference = 2 * pi * r;
printf("circumference=%f \n", circumference);
 
}

Output

enter radius of circle:
6
area of circle=113.040001
circumference=37.680000
Press any key to continue . . .

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.

Practice suggestion

After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.