How to output three-digit numbers in reverse order in python

Method: 1. Use list() to store three digits in the list; 2. Use reverse() to reverse the list elements; 3. Use the "int (list name [subscript])" statement to get the reverse The converted numbers are stored in variables a, b, and c; 4. Use the "a*100 b*10 c" statement to splice into three digits in reverse order; 5. Use print() to output.

#The operating environment of this tutorial: Windows 7 system, Python 3 version, Dell G3 computer.

Principle:

• Use the list() method to list the input three digits in the form of a string

• Take out the units, tens, and hundreds digits from the list in reverse order

• When outputting, pay attention to converting the str type to the int type.

#输入number = 123,输出321
number = input('请输入一个三位数：')
list1 = list(number) #将输入的三位数的字符串存入列表
list1.reverse() #将列表元素反转
a = int(list1[0]) #取出反转后列表的元素并将其类型转为int类型
b = int(list1[1])
c = int(list1[2])  #也可以不反转列表，直接反着取出列表中的元素
re_number = a*100 + b*10 + c
print('%s的反转数是:%s'%(number,re_number))
print('%d的反转数是:%d'%(int(number),re_number))

Related function description

The input() function in Python3.x accepts a standard input data and returns it as string type.

int() function is used to convert a string or number into an integer.

【Related recommendations: Python3 video tutorial】

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