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Go’s math/rand/v2 package provides
pseudorandom number
generation.
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package main
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import (
"fmt"
"math/rand/v2"
)
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func main() {
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For example, rand.IntN returns a random int n,
0 <= n < 100.
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fmt.Print(rand.IntN(100), ",")
fmt.Print(rand.IntN(100))
fmt.Println()
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rand.Float64 returns a float64 f,
0.0 <= f < 1.0.
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fmt.Println(rand.Float64())
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This can be used to generate random floats in
other ranges, for example 5.0 <= f' < 10.0.
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fmt.Print((rand.Float64()*5)+5, ",")
fmt.Print((rand.Float64() * 5) + 5)
fmt.Println()
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If you want a known seed, create a new
rand.Source and pass it into the New
constructor. NewPCG creates a new
PCG
source that requires a seed of two uint64
numbers.
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s2 := rand.NewPCG(42, 1024)
r2 := rand.New(s2)
fmt.Print(r2.IntN(100), ",")
fmt.Print(r2.IntN(100))
fmt.Println()
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s3 := rand.NewPCG(42, 1024)
r3 := rand.New(s3)
fmt.Print(r3.IntN(100), ",")
fmt.Print(r3.IntN(100))
fmt.Println()
}
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