How remove or skip spaces in nested loop patterns-CodePudding

I have this little code that is to create the output below:

##
# #
#  #
#   #
#    #
#     # <- Wanted output


   ##
   ###
   ####
   #####
   ######
   ####### <- Current output

How do I add spaces and remove "#"? The pattern is six long (straight down) increasing by one each line but only having two "#" per line all the way down.

Code: import java.util.Scanner;

public class Pattern {
    public static void main(String[] args) {
        final int BASE_SIZE = 6;

        for (int r = 0; r < BASE_SIZE; r  ){

            for (int c = 0; c < (r 2); c  ){
            System.out.print("#");
            }
            System.out.println();
        }





    }
}

CodePudding user response：

You need to print one hash mark, print spaces up to current r value, then print final hash mark.

final int BASE_SIZE = 6;

for (int r = 0; r < BASE_SIZE; r  ){
    System.out.print("#");
    for (int i = 0; i < r; i  ) {
        System.out.print(" ");
    }
    System.out.println("#");
}

prints

##
# #
#  #
#   #
#    #
#     #

CodePudding user response：

In each line, Instead of printing c # characters, you print one # character, then c-2 space characters, then another # character.

CodePudding user response：

You just have to update your inner for loop where you print empty spaces if the column value is not first(c=0) and last ( c=r 1) for each row.

public class Pattern {
    public static void main(String[] args) {
        final int BASE_SIZE = 6;

        for (int r = 0; r < BASE_SIZE; r  ){

            for (int c = 0; c < (r 2); c  ){
                if ( c == 0 || c == r 1)
            System.out.print("#");
                else 
                    System.out.print(" ");
            }
            System.out.println();
        }

    }
}

and the output is like this:

##
# #
#  #
#   #
#    #
#     #

CodePudding user response：

This works perfectly and you can specify the side size.

public static void wantedPatern (int side) {
    for (int i = 0; i < side; i  ){
        System.out.print("#");
        for(int k = -i; k < 0; k  ){
            System.out.print(" ");
        }
        System.out.println("#");
    }
}

Output with side 9 wantedPatern(9)

##
# #
#  #
#   #
#    #
#     #
#      #
#       #
#        #