py（for语句）

for 语句

""">>> range(5)[0, 1, 2, 3, 4]>>> range(7)[0, 1, 2, 3, 4, 5, 6]>>> range(1,7)[1, 2, 3, 4, 5, 6]>>> range(2,7)[2, 3, 4, 5, 6]>>> range(11)[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]>>> range(10)[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]>>> range(1,11,2)[1, 3, 5, 7, 9]>>> range(2,11,2)[2, 4, 6, 8, 10]>>> range(2,11,3)[2, 5, 8]>>> range(11,2)[]
range():内置的python函数
range(stop):0~stop-1
range(start,stop):start~stop-1
range(start,stop,step):step:为步长
"""


#求1&＃xff5e;100的和

sum &＃61; 0
for i in range(1,101):sum &＃43;&＃61;i #sum &＃61; sum &＃43; iprint(sum)


#求1&＃xff5e;100的奇数之后

sum &＃61; 0
for i in range(1,101,2):sum &＃43;&＃61; i
print(sum)


#求1&＃xff5e;100的偶数之后

sum &＃61; 0
for i in range(2,101,2):sum &＃43;&＃61; i
print(sum)


#用户输入一个数字&＃xff0c;求该数的阶乘&＃xff1a;3!&＃61;321

a &＃61; int(input(&＃39;请输入一个数字&＃xff1a;&＃39;))
sum &＃61; 1
for i in range(1,a):sum &＃61; sum * (i&＃43;1)
print(sum)