2. Check whether a string is palindrome or not

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2. Check whether a string is palindrome or not


Problem link :- click here


package programs;

public class String__2
{

	/*
	 	Given a string s, check if it is palindrome or not.
	 	
	 	First copy the string to a char type.
	 	then check if the array is palindrome.
	*/
	
	static Boolean palindromeCheck(String s)
	{
		String st  = s.toLowerCase();
		char str[] = st.toCharArray();
		
		int i, j;
		i = 0; 
		j = str.length - 1;
		
		for(i=0, j=str.length-1;  i<j;  i++, j--)
		{
			if(str[i] != str[j])
				return false;
		}
		return true;
	}
	
	public static void main(String[] args)
	{
		String s = "Malayalam";
		
		System.out.println("Given string : " + s);
		
		Boolean ans = palindromeCheck(s);
		if(ans)
			System.out.println("The given string is palindrome");
		else
			System.out.println("The given string is not palindrome");
	}

}

Time complexity :- O(n)
Space complexity :- O(1)


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