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![Thomas Rossini](https://secure.gravatar.com/avatar/ae61aa978694c8ea601fd4a7cb38fb48?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Thomas Rossini
544 Points()) purpose?
what is the purpose of this when I see it used to create a while loop or if condition ?
exa: while (dispenser.dispense())
and: if (dispenser.isEmpty())
1 Answer
![Steven Parker](https://uploads.teamtreehouse.com/production/profile-photos/969492/micro_tool_chess_set_2.jpg)
Steven Parker
230,688 PointsParentheses after a method name cause the method to be "called" (or "invoked"). Basically this just means the code in the method will run. If the method returns a value, that value will be substituted for the method call in the expression.
This is the same as with functions, it's not unique to object methods.
Thomas Rossini
544 PointsThomas Rossini
544 PointsI understand that , () calls a method but I'm asking about when I see the double or triple parentheses ()) ?
Steven Parker
230,688 PointsSteven Parker
230,688 PointsThere's two different things there. The matched parentheses () are for calling the method. The other closing one ) is part of the conditional expression that started right after the "while" or "if":