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< b > ExistsCommand: Contents< / b > < br > < a href = "#EXISTS _key_" > EXISTS _key_< / a > < br > < a href = "#Return value" > Return value< / a >
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< h1 class = "wikiname" > ExistsCommand< / h1 >
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ï » ¿ #sidebar < a href = "GenericCommandsSidebar.html" > GenericCommandsSidebar< / a > < h1 > < a name = "EXISTS _key_" > EXISTS _key_< / a > < / h1 >
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< i > Time complexity: O(1)< / i > < blockquote > Test if the specified key exists. The command returns" 0" if the key exists, otherwise " 1" is returned.Note that even keys set with an empty string as value willreturn " 1" .< / blockquote >
< h2 > < a name = "Return value" > Return value< / a > < / h2 > < a href = "ReplyTypes.html" > Integer reply< / a > , specifically:< br / > < br / > < pre class = "codeblock python" name = "code" >
1 if the key exists.
0 if the key does not exist.
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