pattern: mirrored diamond

#include<stdio.h>
int main(){
    int col;
    printf("Enter number of columns: ");
    scanf("%d", &col);
    for(int i = 1; i <= col; i++){
        for(int j = 1; j <= col-i; j++){printf(" ");}
        for(int j = 1; j <= i; j++){printf("*");}
        printf("\n");
    }
    for(int i = col-1; i>0; i--){
        for(int j = 1; j <= col-i; j++){printf(" ");}
        for(int j = 1; j <= i; j++){printf("*");}
        printf("\n");
    }
    return 0;
}