Why don't run it?? Plz someone help me

Question

#include <stdio.h>
float pi=3.14;
int main ()
{
float radius,area;
printf("Enter radius of circle (in cm):");
scanf ("%f",&radius);
area=(pi)*(radius*radius);
printf("Area of the circle is:%.2f square cm",area);
retur0;
}

Answer 1

return 0;

Answer 2

return 0;

Answer 3

thanks a lot bro