python palindrome number judgment

What is a palindrome number?

There is a type of number that looks the same when viewed backwards and forwards, for example: 12321, 1221, 2332, etc. Such numbers are called palindromes

Enter a 5-digit number and use python to determine whether it is a palindrome number. That is, 12321 is a palindrome number, the ones digit is the same as the thousands digit, and the tens digit is the same as the thousands digit.

Method 1: Use for loop

# 找出5位数中所有的回文数：for i in range(10000,100000): # 遍历所有的5位数 s = str(i) # 将数转换成字符串类型，即可以用索引取出每一位上的数字 if s[0] == s[-1] and s[1] == s[-2]: # 字符串的索引 print(i)

Method 2: Define function:

def is_huiwen(n): reversed_str= str(n) return reversed_str == reversed_str[-1::-1] # output = filter(is_huiwen,range(10000,100000)) print(list(output))

User input A 5-digit number, to determine whether it is a palindrome number:

# 输入一个5位数，判断它是否是回文数：a = int(input(" 请输入一个5位整数：")) s = str(a)if s[0] == s[-1] and s[1] == s[-2]: print(" %d 是一个回文数！" % a)else: print(" %d 不是一个回文数！" % a)

To determine whether any integer is a palindrome number:

n = int(input('请输入一个整数：')) s = str(n) f = Truefor i in range(len(s)//2): if s[i] != s[-1-i]: f = False breakif f: print('%d 是一个回文数' % n)else: print('%d 不是一个回文数' % n)

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