[daily 3 questions (1)] judge the color of a grid on the chess board

subject ：

Give you a coordinate  coordinates , It's a string , Represents the coordinates of a grid in a chess board . The following is a schematic diagram of the chess board .

If the color of the given grid is white , Please return  true, If it's black , Please return  false .

The given coordinates must represent an existing grid on the chess board . The first character in the coordinates is the letter , The second character is the number .

Example 1：

Input ：coordinates = “a1”
Output ：false
explain ： As shown on the chessboard above ,“a1” The coordinates of the grid are black , So back false .
Example 2：

Input ：coordinates = “h3”
Output ：true
explain ： As shown on the chessboard above ,“h3” The grid of coordinates is white , So back true .
Example 3：

Input ：coordinates = “c7”
Output ：false

Tips ：

coordinates.length == 2
‘a’ <= coordinates[0] <= ‘h’
‘1’ <= coordinates[1] <= ‘8’

java Code ：

class Solution {
    public boolean squareIsWhite(String coordinates) {
return (coordinates.charAt(0) + coordinates.charAt(1)) %2>0;
    }
}