Provided by: libstdc++6-4.5-doc_4.5.3-12ubuntu2_all

#### NAME

```       std::exponential_distribution< _RealType > -

```

#### SYNOPSIS

```   Classes
struct param_type

Public Types
typedef _RealType result_type

Public Member Functions
exponential_distribution (const result_type &__lambda=result_type(1))
exponential_distribution (const param_type &__p)
_RealType lambda () const
result_type max () const
result_type min () const
template<typename _UniformRandomNumberGenerator > result_type operator()
(_UniformRandomNumberGenerator &__urng)
template<typename _UniformRandomNumberGenerator > result_type operator()
(_UniformRandomNumberGenerator &__urng, const param_type &__p)
param_type param () const
void param (const param_type &__param)
void reset ()

```

#### DetailedDescription

```   template<typename _RealType = double>class std::exponential_distribution< _RealType >
An exponential continuous distribution for random numbers.

The formula for the exponential probability density function is \$p(x|bda) = bda e^{-bda
x}\$.

Mean\$ac{1}{bda}\$ Median\$ac{}}bda}\$ Mode\$zero\$ Range\$[0, infty]\$ Standard
Deviation\$ac{1}{bda}\$ Distribution Statistics

Definition at line 4161 of file random.h.

```

#### MemberTypedefDocumentation

```   template<typename _RealType = double> typedef _RealType std::exponential_distribution<
_RealType >::result_type The type of the range of the distribution.
Definition at line 4168 of file random.h.

```

#### Constructor&DestructorDocumentation

```   template<typename _RealType = double> std::exponential_distribution< _RealType
>::exponential_distribution (const result_type &__lambda = result_type(1)) [inline,
explicit]
Constructs an exponential distribution with inverse scale parameter \$bda\$.

Definition at line 4199 of file random.h.

```

#### MemberFunctionDocumentation

```   template<typename _RealType = double> _RealType std::exponential_distribution< _RealType
>::lambda () const [inline]
Returns the inverse scale parameter of the distribution.

Definition at line 4220 of file random.h.

template<typename _RealType = double> result_type std::exponential_distribution< _RealType
>::max () const [inline]
Returns the least upper bound value of the distribution.

Definition at line 4249 of file random.h.

template<typename _RealType = double> result_type std::exponential_distribution< _RealType
>::min () const [inline]
Returns the greatest lower bound value of the distribution.

Definition at line 4242 of file random.h.

template<typename _RealType = double> template<typename _UniformRandomNumberGenerator >
result_type std::exponential_distribution< _RealType >::operator()
(_UniformRandomNumberGenerator &__urng) [inline]
Generating functions.

Definition at line 4257 of file random.h.

References std::exponential_distribution< _RealType >::operator()(), and
std::exponential_distribution< _RealType >::param().

Referenced by std::exponential_distribution< _RealType >::operator()().

template<typename _RealType = double> param_type std::exponential_distribution< _RealType
>::param () const [inline]
Returns the parameter set of the distribution.

Definition at line 4227 of file random.h.

Referenced by std::exponential_distribution< _RealType >::operator()(), std::operator==(),
and std::operator>>().

template<typename _RealType = double> void std::exponential_distribution< _RealType >::param
(const param_type &__param) [inline]
Sets the parameter set of the distribution. Parameters:
__param The new parameter set of the distribution.

Definition at line 4235 of file random.h.

template<typename _RealType = double> void std::exponential_distribution< _RealType >::reset
() [inline]
Resets the distribution state. Has no effect on exponential distributions.

Definition at line 4214 of file random.h.

```

#### Author

```       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++                                Mon Apr std::exponential_distribution< _RealType >(3cxx)
```