描述
Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.
Example 1:
Input: "Hello"
Output: "hello"
Example 2:
Input: "here"
Output: "here"
Example 3:
Input: "LOVELY"
Output: "lovely"
解析
根据题意，遍历每个字符，如果 ascii 大于等于 65 小于等于 90 ，则是大写字母，需要转换为小写字母，其他情况则是小写字母直接使用，拼接起来就是小写字符串结果。
解答
class Solution(object):
def toLowerCase(self, str):
"""
:type str: str
:rtype: str
"""
result = ""
for c in str:
if 65 <=ord(c) <= 90:
result += chr(ord(c)+32)
else:
result += c
return result
运行结果
Runtime: 8 ms, faster than 99.61% of Python online submissions for To Lower Case.
Memory Usage: 13.6 MB, less than 29.94% of Python online submissions for To Lower Case.
原题链接：leetcode.com/problems/to…
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