Difference between JOIN and Inner JOIN in Sybase

I have a query like below. I don’t understand the difference between join vs inner join used on the below code. Aren’t they the same? This is written for Sybase. Please help me know the difference.

SELECT
   count(distinct c.stuID ) as cnt 
FROM
   tableC c 
   Inner Join
      tableB b 
      On c.otherID = b.otherID 
   Inner Join
      tableX gd 
      On b.otherID = gd.otherID 
   Inner Join
      tableY g 
      On gd.groupID = g.GROUPID 
      and g.GROUPTYPEID in 
      (
         1,
         3
      )
   JOIN
      tableZ d 
      on c.OPID = d.OPID 
   JOIN
      tableM e 
      on c.OTHERID = e.otherID 
      and c.stuID = e.stuID 
      and DATEDIFF(..........)

Answer

According to the standard INNER JOIN=JOIN. I think, Sybase does not break this rule