Forth stack effect comments

Contents

• Sources
• In word definitions

Sources

• Leo Brodie, Starting FORTH,
  • Chapter 1: Fundamental Forth
  • Chapter 2: How to Get Results

In word definitions

Format: ( before -- after ), with “before” meaning what is at the top of the stack before the call, and “after” meaning what is at the top of the stack after the call.

: add5 ( n -- n ) 5 + ;
1 add5 .