"""用*号打印三角形"""
for x in range(-10,11):
print('*' * (10-abs(x)))
"""用*号打印正弦曲线"""
from math import * # 从数学模块导入所有命令
for x in range(0,180):
y = int(80 * sin(radians(x))) # radians把弧度值转为角度值
print('*' * y)
"""用*号打印周期性三角形"""
for x in range(0,60):
print('*' * (20-abs(x%20)))
