时间:2020-07-20 python爬虫 查看: 2439
简单的for循环打印三角形
1,for循环方法实现星星三角
代码:
for i in range(0,5):
for j in range(i+1):
if i == 4:
print("* ",end="")
continue
if j == 0 or j == i:
print("* ",end="")
else:
print(" ",end="")
print()
2.实心三角:
for i in range(5):
print("* " * (i+1))
3.实心正方形
for i in range(5):
print("* "*5)
print()
4.空心正方形
for i in range(5):
print("* "*5)
print()
for i in range(4):
if i == 0:
print("* " * 5)
if i ==3:
print("* " * 5)
continue
for j in range(5):
if j == 0:
print("* ",end=" ")
if j == 4:
print("* ")
else:
print(" ",end="")
5.金字塔:
for i in range(5):
print(" "*(4-i),end="")
print(" * "*(i+1))
刚开始学习,博客写得不是很好。
补充知识:python:任意输入3个数,判断能否组成三角形
任意输入3个数,判断能否组成三角形,并输出三角形为等边/等腰/直角/普通三角形.
三角形:两边之和大于第三边
直角三角形:勾股定理
#!/usr/bin/python
# -*- coding:utf-8 -*-
#输入合法性检查,必须输入正数,不支持科学计数法
def ispositive(numb):
try:
float(numb)
except:
return False
else:
if float(numb) <= 0:
return False
else:
return True
#直角三角形判断
def ispythagoras(a,b,c):
if a**2 + b**2 == c**2 or a**2 + c**2 == b**2 or b**2 + c**2 == a**2:
return True
else:
return False
num1 = input("pls enter 1st number:\n")
while not ispositive(num1):
num1 = input("That's not a valid number. Try again:\n")
num2 = input("pls enter 2nd number:\n")
while not ispositive(num2):
num2 = input("That's not a valid number. Try again:\n")
num3 = input("pls enter 3rd number:\n")
while not ispositive(num3):
num3 = input("That's not a valid number. Try again:\n")
num1 = float(num1)
num2 = float(num2)
num3 = float(num3)
#欢迎点评,引用请注明出处
if num1 + num2 > num3 and num2 + num3 > num1 and num1 + num3 > num2:
if num1 == num2 == num3:
print("%.2f\n%.2f\n%.2f\n可以组成等边三角形" % (num1,num2,num3))
elif num1 == num2 or num2 == num3 or num1 == num3:
if ispythagoras(num1,num2,num3):
print('%.2f\n%.2f\n%.2f\n可以组成等腰直角三角形' % (num1,num2,num3))
else:
print('%.2f\n%.2f\n%.2f\n可以组成等腰三角形' % (num1,num2,num3))
elif ispythagoras(num1,num2,num3):
print('%.2f\n%.2f\n%.2f\n可以组成直角三角形' % (num1,num2,num3))
else:
print('%.2f\n%.2f\n%.2f\n可以组成普通三角形' % (num1,num2,num3))
else:
print('%.2f\n%.2f\n%.2f\n不能组成三角形' % (num1,num2,num3))
以上这篇Python利用for循环打印星号三角形的案例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持python博客。