# How to Get Float64 Type Random Number in Golang?

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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