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std::log2 – cppreference.com

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definiert in Header

<cmath>

float log2( float arg );

(seit C++11)

double log2( double arg );

(seit C++11)

long double log2( long double arg );

(seit C++11)

double log2( Integral arg );

(seit C++11)

Berechnet die Basis 2 Logarithmus arg .

Original:

Computes the base 2 logarithm of arg.

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Parameter

arg -

Floating-Point-Wert

Original:

floating point value

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Rückgabewert

log
2
(arg)

Domain-Fehler tritt auf, wenn arg negativ ist. NAN wird in diesem Fall wieder .

Original:

Domain error occurs if arg is negative. NAN is returned in that case.

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Bereichs-Fehler tritt auf, wenn arg ist 0. -HUGE_VAL wird in diesem Fall wieder .

Original:

Range error occurs if arg is 0. -HUGE_VAL is returned in that case.

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Siehe auch

berechnet natürlichen (base e) Logarithmus (zur Basis e) (ln(x))

Original:

computes natural (base e) logarithm (to base e) (ln(x))

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(Funktion) [edit]

(C++11)

Renditen 2 an die angegebene Leistung (2x) angehoben

Original:

returns 2 raised to the given power (2x)

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(Funktion) [edit]

berechnet gemeinsamen (base 10) Logarithmus (log10(x))

Original:

computes common (base 10) logarithm (log10(x))

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(Funktion) [edit]