Context
Context[]
gives the current context.
Context[symbol]
gives the context in which a symbol appears.
Context["symbol"]
gives the context in which the symbol named "symbol" appears if it exists.
Examples
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Wolfram Research (1988), Context, Wolfram Language function, https://reference.wolfram.com/language/ref/Context.html.
Text
Wolfram Research (1988), Context, Wolfram Language function, https://reference.wolfram.com/language/ref/Context.html.
CMS
Wolfram Language. 1988. "Context." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Context.html.
APA
Wolfram Language. (1988). Context. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Context.html