The term for a variable in a conditional

In the following statemen开发者_JAVA技巧t what is the term to refer to the $country operand? Could it be the evaluated variable?

if($country == "Bulgaria"){}

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I don't think there's a language-agnostic term for it.

It could be an expression, an operand, a variable ...

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There's no special name for any of the operands, they are completely equal from the language standpoint. You just compare something to something, each "something" can be a variable or not.