Tutorial: Subroutines

Subroutines are an important tool for creating well structured programs. A subroutine is a block of program code that once written can be invoked from several places in a program to perform its function. Think of a subroutine as a re-usable building block.

What this tutorial will teach you (Outcomes)

• Basic concepts: how subroutines fit into a program
• The subroutine stack (how SPLatty manages it for you)
• Do's and don't's, common pitfalls
• Argument passing

What you need to do or know first (Prerequisites)

• Do the online training course (FastTrack tutorial)
• An understanding of the register stack. This is covered in the SPLat/PC help file.