python 这几行代码求解，能写上注释更好

Question

size = int(input("请输入棋盘的大小："))
for i in range(size):
    for j in range(size):
        if i == 0 and j == 0:
            print("┏",end='')
        elif i == 0 and j == size - 1:
            print("┓",end='')
        elif i == size - 1 and j == 0:
            print("┗",end='')
        elif i == size - 1 and j == size - 1:
            print("┛",end='')
        elif j == 0:
            print("┠",end='')
        elif i == size - 1:
            print("┷",end='')
        elif j == size - 1:
            print("┨",end='')
        elif i == 0:
            print("┯",end='')
        else:
            print("┼",end='')
    print('')

Answer 1

size = int(input("请输入棋盘的大小："))
for i in range(size):   # 行
    for j in range(size):  # 列
        if i == 0 and j == 0:  # 左上角在0行0列
            print("┏", end='')
        elif i == 0 and j == size - 1:  # 右上角在0行最后一列
            print("┓", end='')
        elif i == size - 1 and j == 0:  # 最后一行，0列，就是左下角
            print("┗", end='')
        elif i == size - 1 and j == size - 1:  # 最后一行，最后一列，就是右下角
            print("┛", end='')
        elif j == 0:    # 0列，最左边的列
            print("┠", end='')
        elif i == size - 1:   # 最末一行
            print("┷", end='')
        elif j == size - 1:   # 最末一列
            print("┨", end='')
        elif i == 0:   # 0行，就是第一行
            print("┯", end='')
        else:
            print("┼",end='')  # 其它的行或列
    print('')  # 换行