std::normal_distribution<RealType>::normal_distribution

std::normal_distribution<RealType>::normal_distribution - cppreference.com

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`normal_distribution() : normal_distribution(0.0) {}`	(1)	(since C++11)
`explicit normal_distribution( RealType mean, RealType stddev = 1.0 );`	(2)	(since C++11)
`explicit normal_distribution( const param_type& params );`	(3)	(since C++11)

Constructs a new distribution object.

2) Uses mean and stddev as the distribution parameters.

3) Uses params as the distribution parameters.

The behavior is undefined if stddev is not greater than zero.

mean	-	the μ distribution parameter (mean)
stddev	-	the σ distribution parameter (standard deviation)
params	-	the distribution parameter set

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