#pass语句
pass #占位符
age = 45
if age > 60:
print("老年人")
if age > 40 and age <= 60:
print("老帅哥")
#断言 assert
age = int(input("输入年纪: "))
assert 20 < age < 60
print(age)
#循环的初始条件
count_i = 0
while count_i < 10:
print("count:", count_i)
count_i += 1
print("循环结束")
count_i2 = 0
while count_i2 < 10 and count_i2 != -10:
print("不停执行的死循环:", count_i2)
count_i2 -= 1
print("循环结束")
a_tuple = ('asd','sdaa0','www')
i = 0
while i < len(a_tuple):
print(a_tuple[i])
i += 1
src_list = [12, 23, 42, 43, 93]
src_list.pop()
print(src_list)
# 老帅哥
# 输入年纪: 50
# 50
# count: 0
# count: 1
# count: 2
# count: 3
# count: 4
# count: 5
# count: 6
# count: 7
# count: 8
# count: 9
# 循环结束
# 不停执行的死循环: 0
# 不停执行的死循环: -1
# 不停执行的死循环: -2
# 不停执行的死循环: -3
# 不停执行的死循环: -4
# 不停执行的死循环: -5
# 不停执行的死循环: -6
# 不停执行的死循环: -7
# 不停执行的死循环: -8
# 不停执行的死循环: -9
# 循环结束
# asd
# sdaa0
# www
# [12, 23, 42, 43]
