Python入门-----for循环之range用法
源码区：
# for x in range(0,10,2):
# print(x,end=" | ")
# for x in range(10,0,-2):
# print(x,end=" ")
#思考题：给出a[1,2,3,4,5,6,7,8]利用for循环和不用for循环提取出列表元素1,3,5,7
# for x in range(1,9,2):
# print(x,end=" | ")
a=[1,2,3,4,5,6,7,8]
for i in range(0,len(a),2):
print(a[i],end=" | ")
# 序列的切片来获取元素,0:len(a)是获取列表长度，第三个参数是步长
b = a[0:len(a):2]
print(b)