Day_4_ReverseString.java

class Solution {
    public void reverseString(char[] s) {
        
        int i=0,j=s.length-1;
        char temp='0';
        
        while(i<=j){
            temp=s[j];
            s[j]=s[i];
            s[i]=temp;
            i++;
            j--;
        }
    }
}