for 变量 in 序列:    
    # 代码块
else:    
    
    # 代码块
    # 通常情况下，我们不用else

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":
    #  for元组遍历
    tuple_1 = (1, 2, 3, 4, 5, 6, 7, 8, 9, 0)

    print(u"遍历元组，并打印出来： ")
    for t in tuple_1:
        print(t)

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":    
    #  for列表遍历
    list_1 = [u'DeepTest', u'开源优测', u'快学Python3']

    print(u"遍历列表，并打印出来： ")    
    for text in list_1:
        print(text)

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":
    #  for字典遍历
    dict_1 = {u"开源优测": u"DeepTest", u"python": u"快学Python3"}

    print(u"遍历字典方式一，并打印出来： ")    
    for (key, value) in dict_1.items():
        print("%s : %s " % (key, value))

    print("\n-----------------------------")

    print(u"遍历字典方式二，并打印出来： ")
    for key in dict_1:
        print("%s : %s " % (key, dict_1[key]))

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":
    print(u"range for循环实例")    

    # 使用默认参数生成序列进行遍历
    for i in range(5):
        print(i, end=',')    
    
    # 换行
    print('')    
    
    # 指定范围生成序列进行遍历
    for i in range(0, 10):
        print(i, end=',')    
    
    # 换行
    print('')    
    
    # 带步长方式生成序列进行遍历
    for i in range(0, 10, 2):
        print(i, end=',')

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":
    print(u"九九乘法表：")    
    for i in range(1, 10):        
        for j in range(i, 10):
            print(u"%d * %d = %2d" % (i, j, i * j), end="  ")

        print("")

while 条件：    # 代码块

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":
    print(u"计算0-100间所有偶数和")
    
    n = 100
    index = 0
    sum = 0
    while index <= n:
        sum = sum + index
        index = index + 2
        
    print(u"0-100间偶数和= %d " % sum)

计算0-100间所有偶数和示例0-100间偶数和= 2550

# -*- coding:utf-8 -*-

__author__ = u'苦叶子'

if __name__ == "__main__":
    print(u"九九乘法表实例：")
    n = 1
    
    while n <= 9:        
        for m in range(n, 10):
            print(u"%d * %d = %2d" % (n, m, n*m), end="  ")

        print("")
        n = n + 1