.TH "std::exponential_distribution< _RealType >" 3cxx "Sun Jan 10 2021" "libstdc++" \" -*- nroff -*-
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.SH NAME
std::exponential_distribution< _RealType > \- An exponential continuous distribution for random numbers\&.  

.SH SYNOPSIS
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.PP
.SS "Classes"

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.RI "struct \fBparam_type\fP"
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.SS "Public Types"

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.RI "typedef _RealType \fBresult_type\fP"
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.SS "Public Member Functions"

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.RI "\fBexponential_distribution\fP ()"
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.RI "Constructs an exponential distribution with inverse scale parameter 1\&.0\&. "
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.RI "\fBexponential_distribution\fP (_RealType __lambda)"
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.RI "Constructs an exponential distribution with inverse scale parameter $\lambda$\&. "
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.RI "\fBexponential_distribution\fP (const \fBparam_type\fP &__p)"
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.RI "template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > void \fB__generate\fP (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng)"
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.RI "template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > void \fB__generate\fP (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng, const \fBparam_type\fP &__p)"
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.RI "template<typename _UniformRandomNumberGenerator > void \fB__generate\fP (\fBresult_type\fP *__f, \fBresult_type\fP *__t, _UniformRandomNumberGenerator &__urng, const \fBparam_type\fP &__p)"
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.RI "_RealType \fBlambda\fP () const"
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.RI "Returns the inverse scale parameter of the distribution\&. "
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.RI "\fBresult_type\fP \fBmax\fP () const"
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.RI "Returns the least upper bound value of the distribution\&. "
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.RI "\fBresult_type\fP \fBmin\fP () const"
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.RI "Returns the greatest lower bound value of the distribution\&. "
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.RI "template<typename _UniformRandomNumberGenerator > \fBresult_type\fP \fBoperator()\fP (_UniformRandomNumberGenerator &__urng)"
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.RI "Generating functions\&. "
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.RI "template<typename _UniformRandomNumberGenerator > \fBresult_type\fP \fBoperator()\fP (_UniformRandomNumberGenerator &__urng, const \fBparam_type\fP &__p)"
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.RI "\fBparam_type\fP \fBparam\fP () const"
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.RI "Returns the parameter set of the distribution\&. "
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.RI "void \fBparam\fP (const \fBparam_type\fP &__param)"
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.RI "Sets the parameter set of the distribution\&. "
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.RI "void \fBreset\fP ()"
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.RI "Resets the distribution state\&. "
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.SS "Friends"

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.RI "bool \fBoperator==\fP (const \fBexponential_distribution\fP &__d1, const \fBexponential_distribution\fP &__d2)"
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.RI "Return true if two exponential distributions have the same parameters\&. "
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.SH "Detailed Description"
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.SS "template<typename _RealType = double>
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class std::exponential_distribution< _RealType >"
An exponential continuous distribution for random numbers\&. 

The formula for the exponential probability density function is $p(x|\lambda) = \lambda e^{-\lambda x}$\&.
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Distribution StatisticsMean$\frac{1}{\lambda}$ Median$\frac{\ln 2}{\lambda}$ Mode$zero$ Range$[0, \infty]$ Standard Deviation$\frac{1}{\lambda}$ 
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Definition at line 4636 of file random\&.h\&.

.SH "Author"
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Generated automatically by Doxygen for libstdc++ from the source code\&.