check column

 /**
     * Function Name: checkColoumns
     * @param board
     * @return count (int)
     * Inside the function
     *    -->will check every column for a straight X or straight O
     *    -->The outer loop picks a column. The inner loop will index each row for that column.
     * 
     */
    public static int checkColoumns(char[][] board){
        int count =0;
        for(int i=0; i<board.length; i++){
            for(int j=0; j<board.length;j++){
                 if(board[j][i]=='X'){
                    count++;
                 }
                 else if(board[j][i]=='O'){
                    count--;
                 }
            }
            if(count==3 || count ==-3){
                return count;
            }
            else{
                count =0;
            }
        }

        return count;
    }