Modern Math NextULongInt

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NextULongInt

Returns a random 64-bit unsigned value, the generator's raw output.

Syntax

NextULongInt( ) as uint64

Notes

• The raw generator output: every bit is random, and every one of the 2^64 values is equally likely.
• This is what the other Next* members are built from -- NextDouble takes 53 bits of it, NextInt rejects and retries to stay unbiased.
• Not secure. CryptoULongInt is the equivalent from the OS entropy source.

Examples

#import "std/numeric"
using numeric

dim r as Rng = RngFromEntropy( )

dim as uint64 a = r.NextULongInt( )
dim as uint64 b = r.NextULongInt( )

print a <> b                 '' -1 (true), with overwhelming probability

'' Do NOT reduce it with MOD to get a range -- that biases the low end.
'' NextInt rejects and retries instead.

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Library: Math Library
Category: Math Library
Documented under: Members