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"Solution:
using System;
using System.Collections.Generic;
using System.Text;
namespace LeetCode.AskGif.Easy.String
{
public class ToLowerCaseSoln
{
public string ToLowerCase(string str)
{
var charArr = str.ToCharArray();
int diff = 'a' - 'A';
for (int i = 0; i < str.Length; i++)
{
char ch = charArr[i];
if (ch >= 65 && ch <= 90)
charArr[i] = (char)(ch + diff);
}
return new string(charArr);
}
}
}
Time Complexity: O(n)
Space Complexity: O(n)
