How to Get Float64 Type Random Number in Golang?
Last Updated :
01 Apr, 2020
Go language provides inbuilt support for generating random numbers of the specified type with the help of a math/rand package. This package implements pseudo-random number generators. These random numbers are generated by a source and this source produces a deterministic sequence of values every time when the program run. And if you want to random numbers for security-sensitive work, then use the crypto/rand package.
You are allowed to generate a pseudo-random number of float64 in [0.0, 1.0) from the default source with the help of the Float64() function provided by the math/rand package. So, you need to add a math/rand package in your program with the help of the import keyword.
Syntax:
func Float64() float64
Let us discuss this concept with the help of the given examples:
Example 1:
package main
import (
"fmt"
"math/rand"
)
func main() {
res_1 := rand.Float64()
res_2 := rand.Float64()
res_3 := rand.Float64()
fmt.Println( "Random Number 1: " , res_1)
fmt.Println( "Random Number 2: " , res_2)
fmt.Println( "Random Number 3: " , res_3)
}
|
Output:
Random Number 1: 0.6046602879796196
Random Number 2: 0.9405090880450124
Random Number 3: 0.6645600532184904
Example 2:
package main
import (
"fmt"
"math/rand"
)
func floatrandom(value_1, value_2 float64) float64 {
return value_1 + value_2 + rand.Float64()
}
func main() {
res1 := floatrandom(34, 56)
res2 := floatrandom(30, 50)
res3 := floatrandom(100, 500)
fmt.Println( "Result 1: " , res1)
fmt.Println( "Result 2: " , res2)
fmt.Println( "Result 3: " , res3)
}
|
Output:
Result 1: 90.60466028797961
Result 2: 80.94050908804502
Result 3: 600.6645600532185
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