1

I wrote:

The left-hand side of an assignment must be a context variable prefixed with either $, # or @# symbols.

When there is 3 symbols above, can I yet use "either"? if no, how can I say it?

  • Just drop either from the sentence and you'll be fine. – Robusto Jan 16 '17 at 16:05
  • When there are three symbols. /a context variable with a $, # or @# prefix/ best to not use the verb here. – Lambie Jan 16 '17 at 16:19
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You have used either correctly, but the sentence would be less ambiguous if you deleted it altogether:

The left-hand side of an assignment must be a context variable prefixed with $, # or @# symbols.

Collins Dictionary says, "You use either in front of the first of two or more alternatives, when you are stating the only possibilities or choices that there are."

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either

is usually for a choice of two, but you have three, you could use

prefixed with any one of

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