Arrow Pattern

# *Arrow Pattern* solution by @CodingComputing

size = 7  # Given parameter
all_star_row = ['*'] * size  # row consisting of all *
for row_idx in range(size):  # for each row to be printed
    row_chars = [' '] * size  # initialize with all spaces
    row_chars[row_idx:] = all_star_row[row_idx:]  # replace upper triangle with *s
    row_chars[size - 1 - row_idx] = '*'  # put single stars at other diagonal
    row = ' '.join(row_chars)  # join over space into printable row
    print(row)  # print!