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math.isnan

documented function · LuaMathExtensions
math.isnan(value) : nan

Returns whether a value is NaN.

──ARGUMENTS
value
number (The value to inspect.)
──RETURNS
nan
bool (True if the value is NaN; otherwise false.)
──DETAILS
Secret Arguments
AllowedWhenUntainted
──VERSION HISTORY

Present since at least 1.60.1.70707, the first build we track.