检查字符串中重复的字符/字母 [英] check for repeated characters/letter in a string

问题描述

hi我想检查一个字符串从用户输入在一个字符串中有两个重复字符/字母eachother ..我有一个简单的代码，以检查字符串中的第一个字母和第二个字母是否相同。 / p>

hi i want to check if a string from user input has two repeated characters/letters in a string next to eachother.. i have a simple code to check if the first letter and second letter in the string are the same.

def two_same():
    d = []
    while len(d) <= 1:
        d = input("enter the same letter twice:")
    if d[0] == d[1]:
        return print(d[0])
two_same()

但是如何检查字符串中的所有字符和用户输入的重复字母。

but how would i check all the characters in the string and for a repeated letter from a user input.

推荐答案

正如已经提到的意见，你应该使用一个for循环：

As the comments already mentioned you should use a for loop:

def two_same(string)
   for i in range(len(string)-1):
      if string[i] == string[i+1]:
         return True
   return False

result = ""
while not two_same(result):
   result = input("enter the same letter twice:")
print(result)

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