The last element in a clause is the semicolon (;) delimiter. The language processor implies the semicolon at a line end, after certain keywords, and after a colon if it follows a single symbol. This means that you need to include semicolons only when there is more than one clause on a line or to end an instruction whose last character is a comma.

A line end usually marks the end of a clause and, thus, Rexx implies a semicolon at most end of lines. However, there are the following exceptions:

Rexx automatically implies semicolons after colons (when following a single symbol or literal string, a label) and after certain keywords when they are in the correct context. The keywords that have this effect are ELSE, OTHERWISE, and THEN. These special cases reduce typographical errors significantly.