条件分支语句,if elif else 代码如下:
# -*- coding: utf-8 -*-
#条件判断
age = int(input('please your age'))
if age < 3:
print('you are baby')
elif age < 9:
print('you are child')
elif age < 19:
print('you are adole')
elif age < 29:
print('you are adult')
elif age < 49:
print('you are middle')
else:
print('you are old')
循环
1 for in 循环
# 循环
# for in 循环
arr = [1, 2, 3, 4, 5]
for v in arr:
print(v)
arr = range(10) #生成0-9的整数序列
arr = list(arr) #将序列转换成数组
print(arr)
sum = 0
for v in arr:
sum += v
print(sum)
# while循环
sum = 0
n = 99
while n > 0:
sum = sum + n
n = n -2
print(sum)
break 和 continue
#break 用于跳出循环
n = 1
while n <= 100:
if n > 10:
break
print(n)
n = n + 1
print('end')
#continue
n = 1
while n < 10:
n = n + 1
if n % 2 == 0:
continue
print(n)
