Value behaves like a
Constant, but it can be changed.
TO is a parsing word that changes a
Values. In Gforth
(not in Standard Forth) you can access (and change) a
value also with
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( value "name" – ) core-ext “TO”
changes the value of name to value
+TO( value "name" – ) gforth-1.0 “+TO”
increments the value of name by value
addr( "name" – addr ) gforth-1.0 “addr”
provides the address addr of the value stored in name