Here is source code of the C program to calculate the area of a circle.
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#include<stdio.h> #include<conio.h> #define PI 3.142 { float r,a; clrscr(); printf("enter the radius:\n"); scanf("%f",&r); a=PI*r*r; printf("Area of Circle is %.2f",a); getch(); } Output: enter the radius: 10 Area of Circle is 314.00 |
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