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std::log2

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< cpp‎ | numeric‎ | math

 
 
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Defined in header <cmath>
float       log2( float arg );
(desde C++11)
double      log2( double arg );
(desde C++11)
long double log2( long double arg );
(desde C++11)
double      log2( Integral arg );
(desde C++11)
Calcula el logaritmo de base de 2 arg .
Original:
Computes the base 2 logarithm of arg.
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[editar] Parámetros

arg -
flotando valor en puntos
Original:
floating point value
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[editar] Valor de retorno

log
2
(arg)

Domain error se produce si arg es negativo. NAN se devuelve en ese caso .
Original:
Domain error occurs if arg is negative. NAN is returned in that case.
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Rango de error se produce si arg es 0. -HUGE_VAL se devuelve en ese caso .
Original:
Range error occurs if arg is 0. -HUGE_VAL is returned in that case.
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[editar] Ver también

calcula natural (base e) logaritmo (base e) (ln(x))
Original:
computes natural (base e) logarithm (to base e) (ln(x))
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(función) [edit]
(C++11)
regresa 2 elevado a la potencia dada (2x)
Original:
returns 2 raised to the given power (2x)
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(función) [edit]
calcula común (base 10') logaritmo (log10(x))
Original:
computes common (base 10) logarithm (log10(x))
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(función) [edit]