if语句
if condition
do something
elif other_condition
do something
#if 用法如下：
#===============================================================================
#
# number=59
# guess =int(input("enter an integer:"))
# #这是input用法
# #print("guess is:"+str(guess))
#
# if guess==number:
# print("right")
# elif guess>number:
# print("highter")
# else:
# print("lower")
#
# print("done")
#===============================================================================
#for用法如下：
#===============================================================================
#遍历数字
# for i in range(1,10):
# print(i)
# else:
# print("the for loop is over")
#===============================================================================
遍历列表
a_list=[1,3,5,7,9]
for i in a_list:
print(i)
遍历元组
a_tuple=(1,3,5,7,9)
for i in a_tuple:
print(i)
遍历字典
a_dict={"Tom":"111","Jerry":"222","Cathy":"333"}
for aaa in a_dict:
print(aaa)
print(a_dict[aaa])
for aa,bb in a_dict.items():
print(aa,bb)