Change FORALL to FOREACH in algorithms package

Simple enough and covered in the algorithms manual:

\renewcommand{\algorithmicforall}{\textbf{for each}}

This command redefines the macro that is used to typeset \FORALL. It should be placed in the document preamble.

You can also use the following trick to convert \FOR into \FOREACH in algorithms package

\FOR{\textbf{each} a in b}
\STATE do something
\ENDFOR

There is a For Each loop in the algorithm2e package.

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