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bool isinf( float arg );
 ( C++11)
bool isinf( double arg );
 ( C++11)
bool isinf( long double arg );
 ( C++11)
, arg .
:
Determines if the given floating point number arg is positive or negative infinity.
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arg
:
floating point value
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true arg , false
:
true if arg is infinite, false otherwise
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