# Problem Analysis:

The problem is to calculate the area of circle having input parameters radius(r).The output is to display the area of the circle.Here PI should be defined.

The formula to calculate the area of the  circle is;

i.e. Area=PI *r *r

Input variables           processing variables                       output variables                              Necessary header files

r(int)                          Area=PI*r*r                                      Area(float)                                       stdio.h

conio.h

define PI 3.14

## Algorithm;

1.Start

2.Define PI 3.14

3.Input the radius of the circle by the user and assign as ;

i.e. int r;

4.Calculate the area of the circle by using formula.

5.print the value of Area.

6.End

## Flowchart; fig: flowchart to print area of the circle.

## Outputs;

Compiling ,Debugging and Testing.

Enter r : 5

area = 78.500000 We the teams of programming faster managed to provide an effective information about the codes of different programming languages.Hope you will learn and understand the codes fast and easy. It's absolutely free, expanding and precise. Our main target is to help those new starters and aid them as far as possible to pave their future in the area of programming. Hoping support and recommendations!

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