Ada Reference Manual (Ada 2022) — Legal Information

# A.5 The Numerics Packages

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The library package Numerics is the parent of several child units that provide facilities for mathematical computation. One child, the generic package Generic_Elementary_Functions, is defined in A.5.1, together with nongeneric equivalents; two others, the package Float_Random and the generic package Discrete_Random, are defined in A.5.2. Additional (optional) children are defined in Annex G, “Numerics”.

#### Static Semantics

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package Ada.Numerics
with Pure is
Argument_Error : exception;
Pi : constant :=
3.14159_26535_89793_23846_26433_83279_50288_41971_69399_37511;
π : constant := Pi;
e : constant :=
2.71828_18284_59045_23536_02874_71352_66249_77572_47093_69996;
end Ada.Numerics;
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The Argument_Error exception is raised by a subprogram in a child unit of Numerics to signal that one or more of the actual subprogram parameters are outside the domain of the corresponding mathematical function.

#### Implementation Permissions

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The implementation may specify the values of Pi and e to a larger number of significant digits.

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