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Hello Terence,

On 3/7/10 7:20 PM, Carsten Strotmann (private) wrote:
> : increase-value ( n addr -- v+n ) TUCK @ + SWAP ! ;

a word that does exactly this exists in most Forth systems as "+!"

+! ( n | u a-addr -- )
Add n | u to the single-cell number at a-addr.

A good reference of Forth Words is the Forth 200x standard document
http://www.forth200x.org/documents/forth09-3.pdf

- -- Carsten

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