# 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:

 `// Golang program to illustrate``// how to get a random number``package main`` ` `import (``    ``"fmt"``    ``"math/rand"``)`` ` `// Main function``func main() {`` ` `    ``// Finding random numbers of float64 type``    ``// Using Float64() function``    ``res_1 := rand.Float64()``    ``res_2 := rand.Float64()``    ``res_3 := rand.Float64()`` ` `    ``// Displaying the result``    ``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:

 `// Golang program to illustrate the``// use of the random numbers``package main`` ` `import (``    ``"fmt"``    ``"math/rand"``)`` ` `// Function``func floatrandom(value_1, value_2 float64) float64 {``    ``return` `value_1 + value_2 + rand.Float64()``}`` ` `// Main function``func main() {`` ` `    ``// Getting result from floatrandom() function``    ``res1 := floatrandom(34, 56)``    ``res2 := floatrandom(30, 50)``    ``res3 := floatrandom(100, 500)`` ` `    ``// Displaying results``    ``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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