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C Program for Program to find the area of a circle?
The area is a quantity that represents the extent of the figure in two dimensions. The area of a circle is the area covered by the circle in a two dimensional plane.
To find the area of a circle, the radius[r] or diameter[d](2* radius) is required.
The formula used to calculate the area is (π*r2) or {(π*d2)/4}.
Example Code
To find the area of a circle using radius.
#include <stdio.h> int main(void) { float pie = 3.14; int radius = 6; printf("The radius of the circle is %d
" , radius); float area = (float)(pie* radius * radius); printf("The area of the given circle is %f", area); return 0; }
Output
The radius of the circle is 6 The area of the given circle is 113.040001
Example Code
To find the area of a circle using radius using math.h library. It uses the pow function of the math class to find the square of the given number.
#include <stdio.h> int main(void) { float pie = 3.14; int radius = 6; printf("The radius of the circle is %d
" , radius); float area = (float)(pie* (pow(radius,2))); printf("The area of the given circle is %f", area); return 0; }
Output
The radius of the circle is 6 The area of the given circle is 113.040001
Example Code
To find the area of a circle using Diameter.
#include <stdio.h> int main(void) { float pie = 3.14; int Diameter = 12; printf("The Diameter of the circle is %d
" , Diameter); float area = (float)((pie* Diameter * Diameter)/4); printf("The area of the given circle is %f", area); return 0; }
Output
The Diameter of the circle is 12 The area of the given circle is 113.040001
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