How to Get Uint64 Type Random Number in Golang?

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

How to Get Uint64 Type Random Number in Golang?

K

Kirti_Mangal

Improve

Article Tags :

Go Language

Similar Reads

How to Get Float32 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 tim

How to Get Int 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 whenever

How to Get Intn 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 tim

How to Get Int31 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 tim

How to Get Uint64 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 whenever

How to Get Uint32 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 tim

How to Get Int63n 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 tim

How to Get Int31n 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 tim

How to get int63 type random number in Go language?

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 tim

How to Generate a Array of Unique Random Numbers in Golang?

Sometimes we need some random numbers but not repeated, generally random numbers are pseudo-random and there is definitely a chance of repetition in them. Let's say we have a range of numbers and we want to have n number of elements in a shuffled way between that range. Using rand.PermSimply we will