Program to find the Area of the circle by taking its radius from the user.| Using C language| very Basic| C Program series 04|

 

👨‍💻Program to find the Area of the circle by taking its radius from the user.

Code:

   

    //Program to accept the value of a circle's radius and print its area.

    #include<stdio.h>

    #define pie 3.141592

    //Here, we declare a variable named 'pie' and assigned its value by using the syntax LIKE:"#define variable_name value".

    //Here, the value of the pie variable is fixed for this whole program. (can not change it further in this code(program) except here.)

    main()

    {

        printf("Program to accept the value of radius and print area of a circle.\n");

       

        float radius,area;

        //Here, we declared two variables named 'radius' & 'area'.

       

        printf("\nEnter the value of radius:");

        scanf("%f",&radius);//Take value of radius from user.

        area=pie*radius*radius;

       

        printf("--> Area of a CIRCLE: %f",area);    

    }

 

Output:

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