# std::weibull_distribution<RealType>::weibull_distribution

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< cpp‎ | numeric‎ | random‎ | weibull distribution

weibull_distribution() : weibull_distribution(1.0) {} | (1) | (since C++11)
explicit weibull_distribution( RealType a, RealType b = 1.0 ); | (2) | (since C++11)
explicit weibull_distribution( const param_type& params ); | (3) | (since C++11)

Constructs a new distribution object.

2) Uses a and b as the distribution parameters.
3) Uses params as the distribution parameters.

### Parameters

a | - | the a distribution parameter (shape)
b | - | the b 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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