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suffix notation (so stack-based)

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So everything is expression, (no stmt) and token sep is also line sep

e.g. newpath 1 1 moveto stroke

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Typical Template

%

newpath

…

stroke % or fill

showpage

%%EOF ← just a comment

Basic

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• Execution3.5 49 (TL;DR):

i.e. literal is a must when one proc is required

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% comment

{expr …} → proc/executable-array (when executed and when to end, all except the last stack item will be cleared)

expr1 expr2-takes-expr1 % e.g. /x 1 2 add 3 sub def → def(x, (1+2)-3)

Variable

In following: