Python的For+While循环的课堂练习（附上文连接）

>> Python每日笔记—Day04 <<

# 课堂小作业1-Star：
# 通过while循环嵌套 实现如下图形
# ****...***
# *        *
# *        *
# *        *
# ****...***

row = int(input("请输入行数"))
col = int(input("请输入列数"))
i = 0
j = 0
while i < row:
    i += 1
    while j < col:
        j += 1
        if i == 1 or i == row:
            print('*', end='')
        elif 2 <= i <= row-1 and (j == 1 or j == col):
            print('*', end='')
        else:
            print(' ', end='')
    else:
            j = 0
    print()

# 课堂小作业2-直角三角形：
# *
# **
# ***
# ****
# *****
# ******
# *******
# ********
# *********

#!/usr/bin/python
# _*_coding:utf-8_*_
# 开发时间：2021/4/8 9:24 
# 文件名称：ClassWork-RightTriangle.PY
# 开发工具：PyCharm
i = 0
j = 0
while i < 9:
    i += 1
    while j < i:
        print('%d*%d=%d ' % (j+1, i, i*(j+1)), end='')
        j += 1
    else:
        j = 0
    print()

'''课堂小作业3-九九乘法表(作业2改：)
1*1=1
1*2=2 2*2=4
1*3=3 2*3=6 3*3=9
1*4=4 2*4=8 3*4=12 4*4=16
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81'''


#!/usr/bin/python
# _*_coding:utf-8_*_
# 开发时间：2021/4/8 9:24 
# 文件名称：ClassWork-RightTriangle.PY
# 开发工具：PyCharm
i = 0
j = 0
while i < 9:
    i += 1
    while j < i:
        print('%d*%d=%d ' % (j+1, i, i*(j+1)), end='')
        j += 1
    else:
        j = 0
    print()

'''
for循环变量 in 序列:
    循环体

   *
  ***
 *****
*******
'''

#!/usr/bin/python
# _*_coding:utf-8_*_
# 开发时间：2021/4/8 8:39 
# 文件名称：ClassWork-Star.PY
# 开发工具：PyCharm
row = int(input("请输入行数"))
col = int(input("请输入列数"))
i = 0
j = 0
while i < row:
    i += 1
    while j < col:
        j += 1
        if i == 1 or i == row:
            print('*', end='')
        elif 2 <= i <= row-1 and (j == 1 or j == col):
            print('*', end='')
        else:
            print(' ', end='')
    else:
            j = 0
    print()