直角三角形
rows = int(input(‘输入列数：’))
for i in range(1, rows):
print(‘*’ * i)
for i in range(1, rows):
for j in range(i):
print(“*”, end=””)
print(“”)
等腰直角三角形
rows = int(input(‘输入列数：’))
for i in range(1, rows):
print(‘ * ‘ * i)
for i in range(1, rows):
for j in range(1, i + 1):
print(” * “, end=””)
print(“”)
打印等腰三角形
rows = int(input(‘输入列数：’))
for i in range(1, rows):
if i % 2 != 0:
str = (‘*’ * i)
print(str.center(9, ‘ ‘))
正方形
rows = int(input(‘输入列数：’))
for i in range(0, rows):
print(” * ” * rows)
for i in range(0, rows):
for j in range(0, rows):
print(” * “, end=””)<