Leetcode : 344. Reverse String | Apple, Amazon, Microsoft

Company : Apple, Amazon, Microsoft

Question : Write a function that reverses a string. The input string is given as an array of characters s.

Example 1:

Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]

Example 2:

Input: s = ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]

Constraints:

• 1 <= s.length <= 105
• s[i] is a printable ascii character.

Follow up: Do not allocate extra space for another array. You must do this by modifying the input array in-place with O(1) extra memory.

Solution :

class Solution {
public void reverseString(char[] s) {
int i=0;


while(i<(s.length/2))
{
char c=s[i];
s[i]=s[s.length-1-i];
s[s.length-1-i]=c;
i++;

}
}
}