Golang : Generate random integer or float number



Tags : golang random number integer float

Was helping out a friend last Sunday to finish up his Golang project and encounter a problem where we need to generate random integer or float number. Below is a snippet of the code that we used to generate the random numbers. Hope this can be useful to your work/project as well.

 package main

 import (
 "math/rand"
 "fmt"
 )

 func randSeed() (p []byte) {
 for i := 0; i < 10; i++ {
 p = append(p, byte(rand.Intn(512)))
 }
 return
 }

 func main() {

 b := randSeed()

 fmt.Println(b)
 }

In case you are looking for random float number. This should do the trick :

 fmt.Println(rand.Float64()) // rand.Float64 returns a float64 value f ...  between  0.0 <= f < 1.0.

and if 0.0 to 1.0 is not what you wanted. You can tweak it to become in between 5.0 <= f < 10.0 with is this line

 fmt.Print((rand.Float64() * 5) + 5)

Reference :

http://golang.org/pkg/math/rand/

  See also : Generate Random number with math/rand in Go



Tags : golang random number integer float

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


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