std::log2 — cppreference.com

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Déclaré dans l'en-tête `<cmath>`
`float log2( float arg );`		(depuis C++11)
`double log2( double arg );`		(depuis C++11)
`long double log2( long double arg );`		(depuis C++11)
`double log2( Integral arg );`		(depuis C++11)

Calcule le logarithme de base de 2 arg .

Original:

Computes the base 2 logarithm of arg.

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arg

valeur du point flottant

Original:

floating point value

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log
2(arg)

Erreur de domaine se produit si arg est négatif. NAN est retourné dans ce cas .

Original:

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

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Erreur d'intervalle se produit si arg est 0. -HUGE_VAL est retourné dans ce cas .

Original:

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

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log	calcule naturel (base e) logarithme (de base e) (ln(x)) Original: computes natural (base e) logarithm (to base e) (ln(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) [edit]

exp2 (C++11)	retours 2 élevé à la puissance donnée (2^x) Original: returns 2 raised to the given power (2^x) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) [edit]

log10	calcule commune (base 10) Logarithme (log₁₀(x)) Original: computes common (base 10) logarithm (log₁₀(x)) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) [edit]