## C Program to Calculate Area and Circumference of circle

## C Program to find area and circumference of circle

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#include<stdio.h> int main() { int rad; float PI = 3.14, area, ci; printf("\nEnter radius of circle: "); scanf("%d", &rad); area = PI * rad * rad; printf("\nArea of circle : %f ", area); ci = 2 * PI * rad; printf("\nCircumference : %f ", ci); return (0); } |

## Output :

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Enter radius of a circle : 1 Area of circle : 3.14 Circumference : 6.28 |

## Explanation of Program :

In this program we have to calculate the area and circumference of the circle. We have following 2 formulas for finding circumference and area of circle.

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Area of Circle = PI * R * R |

and

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Circumference of Circle = 2 * PI * R |

In the above program we have declared the floating point variable PI whose value is defaulted to 3.14.We are accepting the radius from user.

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printf("\nEnter radius of circle: "); scanf("%d", &rad); |

## Download C Program :

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