# std::gamma_distribution<RealType>::gamma_distribution

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< cpp‎ | numeric‎ | random‎ | gamma distribution

gamma_distribution() : gamma_distribution(1.0) {} | (1) | (since C++11)
explicit gamma_distribution( RealType alpha, RealType beta = 1.0 ); | (2) | (since C++11)
explicit gamma_distribution( const param_type& params ); | (3) | (since C++11)

Constructs a new distribution object. (2) uses `alpha` and `beta` as the distribution parameters. (3) uses `params` as the distribution parameters.

### Parameters

alpha | - | the α distribution parameter (shape)
beta | - | the β distribution parameter (scale)
params | - | the distribution parameter set

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
P0935R0 | C++11 | default constructor was explicit | made implicit

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