Modern Math NextDoubleRange

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NextDoubleRange

Returns a random Double from lo up to but not including hi.

Syntax

NextDoubleRange( byval lo as float64, byval hi as float64 ) as float64

Notes

• Half-open like NextDouble: lo can come up, hi cannot.
• Computed as lo + NextDouble( ) * ( hi - lo ), so the spacing is uniform in the interval.
• A reversed pair -- hi below lo -- is the caller's mistake and is not checked.

Examples

#import "std/numeric"
using numeric

dim r as Rng = RngFromEntropy( )

dim as float64 v = r.NextDoubleRange( 10.0, 20.0 )
print v >= 10.0 andalso v < 20.0              '' -1 (true)

dim as int32 outside = 0
for i as int32 = 1 to 1000
    dim as float64 x = r.NextDoubleRange( -1.0, 1.0 )
    if x < -1.0 orelse x >= 1.0 then outside += 1
next
print outside                '' 0

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