# -*- coding:utf-8 -*-
# -Author: Paulliam -
for i in range (10):
    print("loop",i)

print("------------------------")

for i in range (0,10,3):  #只打印0到9這10個數中能被3整除的數
print("loop",i)

######執行結果：

"D:\Program Files\python-3.6.4\python.exe" C:/Users/Administrator/Desktop/python-prj/while1-for.py
loop 0
loop 1
loop 2
loop 3
loop 4
loop 5
loop 6
loop 7
loop 8
loop 9
------------------------
loop 0
loop 3
loop 6
loop 9


Process finished with exit code 0