1. if 语句
if condition:
do something
elif other_condition:
if condition:
do something
elif other_condition:
do something
例:
#if statement example
number = 59
guess = int(input('Enter an integer : '))
# print("guess is: "+str(guess))
if guess == number:
# New block starts here
print('Bingo! you guessed it right.')
print('(but you do not win any prizes!)')
# New block ends here
elif guess < number:
# Another block
print('No, the number is higher than that')
else:
print('No, the number is lower than that')
# you must have guessed > number to reach here
print('Done')
# This last statement is always
number = 59
guess = int(input('Enter an integer : '))
# print("guess is: "+str(guess))
if guess == number:
# New block starts here
print('Bingo! you guessed it right.')
print('(but you do not win any prizes!)')
# New block ends here
elif guess < number:
# Another block
print('No, the number is higher than that')
else:
print('No, the number is lower than that')
# you must have guessed > number to reach here
print('Done')
# This last statement is always
#the for loop example
for i in range(1, 10): #range是一个关键字,表示从第一个数字到第二个数字的所有值的一个列表,但是他只包含第一个数字并不包含最后一个数字
print(i)
else:
print('The for loop is over')
a_list = [1, 3, 5, 7, 9] #列表
for i in a_list:
print(i)
a_tuple = (1, 3, 5, 7, 9) #元组
for i in a_tuple:
print(i)
a_dict = {'Tom':'111', 'Jerry':'222', 'Cathy':'333'}
for ele in a_dict:
print(ele) #打印字典的键
print(a_dict[ele]) #打印字典的值
for key, elem in a_dict.items(): #通过“.items”打印出所有的值
print(key, elem)
for i in range(1, 10): #range是一个关键字,表示从第一个数字到第二个数字的所有值的一个列表,但是他只包含第一个数字并不包含最后一个数字
print(i)
else:
print('The for loop is over')
a_list = [1, 3, 5, 7, 9] #列表
for i in a_list:
print(i)
a_tuple = (1, 3, 5, 7, 9) #元组
for i in a_tuple:
print(i)
a_dict = {'Tom':'111', 'Jerry':'222', 'Cathy':'333'}
for ele in a_dict:
print(ele) #打印字典的键
print(a_dict[ele]) #打印字典的值
for key, elem in a_dict.items(): #通过“.items”打印出所有的值
print(key, elem)