Claculate Value of Pi up to 2,3,4,5 decimal places using c program

Calculate Value of Pi up to 2,3,4,5 decimal places using c program

#include<stdio.h>
#include<math.h>
void main()
{
    float i= 4.0;
    int itr=1;
    int j=3;
    while(fabs(i-3.14000f)>0.00001f)
    {
        i=i + pow(-1,itr)*(4.0/j);
            //printf("%f\n",i);
        itr++;
        j=j+2;   
    }
    printf("Irt for 3.14 =%d\n",itr);
    itr=1,j=3,i = 4.0;
    while(fabs(i-3.14100f)>0.00001f)
        {
                i=i + pow(-1,itr)*(4.0/j);
                //printf("%f\n",i);
                itr++;
                j=j+2;
        }
    printf("Itr for 3.141=%d\n",itr);
    itr=1,j=3,i=4.0;
    while(fabs(i-3.14150f)>0.00001f)
        {
                i=i + pow(-1,itr)*(4.0/j);
                //printf("%f\n",i);
                itr++;
                j=j+2;
        }
    printf("itr for 3.1415=%d\n",itr);
    itr=1,j=3,i=4.0;
    while(fabs(i-3.141590f)>0.00001f)
        {
                i=i + pow(-1,itr)*(4.0/j);
                //printf("%f\n",i);
                itr++;
                j=j+2;
        }
    printf("itr for 3.14159=%d\n",itr);

}