Valid Palindrome.java

public class Solution {
    public boolean isPalindrome(String str) {
        // Start typing your Java solution below
        // DO NOT write main() function
        str=str.toLowerCase(); 
        int start=0, end=str.length()-1; 

  while(start<=end)
  {
    if(start<=end && outOfRange(str.charAt(start)))
    {
      start++; continue;
    }
    if(start<=end && outOfRange(str.charAt(end)))
    {
      end--; continue;
    }
    if(str.charAt(start)!=str.charAt(end))
    {
       return false;
    }
    start++; 
    end--;
  }
  return true; 
    }
    
boolean outOfRange(char temp)
{
    if(temp>='0'&&temp<='9') return false; 
    if(temp<'a') return true; 
    if(temp>'z') return true; 
    return false; 
}

    
}