how to draw concentric circles with help of while loop

concentric  circles which share same axis ,center and origin.
so sphere and disks are concentric circle we can assume.

#include<graphics.h> //graphic shows header file for design in c language.

main()
{
    int gd=DETECT,gm;
    int n,x=10;
    initgraph(&gd,&gm," ");
    printf("How many concentric circles do you want?");//asking for number of circle want to draw.
    scanf("%d",&n);
    while(n!=0)
    {
    circle(240,150,x);
    setcolor(GREEN);// setting color as green.
    x+=10;
    n--;
    }
    getch(); // end of main
    closegraph();
}
programming examples for concentric circles

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