std::normal_distribution::normal_distribution
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                    < cpp | numeric | random | normal distribution
                    
                                                            
                    | explicit normal_distribution( RealType mean = 0.0, RealType stddev = 1.0 ); | (1) | (since C++11) | 
| explicit normal_distribution( const param_type& params ); | (2) | (since C++11) | 
Constructs a new distribution object. The first version uses mean and stddev as the distribution parameters, the second version uses params as the distribution parameters.
[edit] Parameters
| mean | - | the μ distribution parameter (mean) | 
| stddev | - | the σ distribution parameter (standard deviation) | 
| params | - | the distribution parameter set | 


