Runs the first instruction list if the condition is true. Runs the second instruction list if the condition is false. See if.
Example:
ifelse colorunder = 15
[fd 50]
[bk 50]
This instruction can be used to get an answer to a question dialog box. If the answer is not empty, it is displayed in a text box. In a procedure, the ifelse instruction can be typed on many lines to add clarity: