What general tips do you have for golfing in Io? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to Io (e.g. "remove comments" is not an answer). Please post one tip per answer.
Code Golf Stack Exchange is a site for recreational programming competitions, not general programming questions. Challenges must have an objective scoring criterion, and it is highly recommended to first post proposed challenges in the Sandbox.