C program to print Half Diamond

#include<stdio.h>

int main(){
    int n,i,j,col=1;
    printf("Enter the number of columns(maximum stars in a row):\n");
    scanf("%d",&n);
    printf("\n");
    for(i=1;i<=n*2;i++){
        for(j=0;j<col;j++)
            printf("* ");
        printf("\n");
        if(i>=n)
            col--;
        else 
            col++;
    }
    return 0;
}