Node:Values, Next:, Previous:Constants, Up:Defining Words


A Value behaves like a Constant, but it can be changed. TO is a parsing word that changes a Values. In Gforth (not in ANS Forth) you can access (and change) a value also with >body.

Here are some examples:

12 Value APPLES     \ Define APPLES with an initial value of 12
34 TO APPLES        \ Change the value of APPLES. TO is a parsing word
1 ' APPLES >body +! \ Increment APPLES.  Non-standard usage.
APPLES              \ puts 35 on the top of the stack.

Value       w "name" --         core-ext       ``Value''

TO       w "name" --         core-ext       ``TO''