print pattern in c

/* ***********************************************
    Write a program to print pattern

 date:03-06-2019
 created by:ANIL DURGAM

*****************************************************/

#include<stdio.h>
#include<math.h>
int main()
{
int i,j,k,n,step=1;
printf("enter row size:");
scanf("%d",&n);
for(i=1;i<=2*n-1;i++)
{

for(k=1;k<=abs(n-i);k++)
{
printf(" ");
}
for(j=1;j<=step;j++)
{
printf("*");
}


if(i<n)
{
step+=2;
}
else
{
step-=2;
}
printf("\n");
}
return 0;
}