While other monks have mentioned the restrictions on variable names and recommended a single conversion function that takes arguments to specify a currency pair, I would suggest using standard currency codes instead of Unicode symbols. The standard codes are all in ASCII, and that has the advantage that a person who does not recognize a particular code can still read it, while an unknown symbol is just "what is that supposed to mean?".

In reply to Re: Currency symbols in variable names by jcb
in thread Currency symbols in variable names by pme

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