Related Articles

# How to Get Int Type Random Number in Golang?

• Last Updated : 26 Mar, 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 whenever 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 non-negative pseudo-random number of integer type from the default source with the help of the Int() 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 to access the Int() function.

Syntax:

`func Int() int`

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 int type``    ``// Using Int() function``    ``res_1 := ``rand``.Int()``    ``res_2 := ``rand``.Int()``    ``res_3 := ``rand``.Int()`` ` `    ``// 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:  5577006791947779410
Random Number 2:  8674665223082153551
Random Number 3:  6129484611666145821
```

Example 2:

 `// Golang program to illustrate``// the use of the random numbers``package main`` ` `import (``    ``"fmt"``    ``"math/rand"``)`` ` `// Function``func intrandom(value_1, value_2 ``int``) ``int` `{``    ``return` `value_1 + value_2 + ``rand``.Int()`` ` `}`` ` `// Main function``func main() {`` ` `    ``// Getting result from intrandom() function``    ``res1 := intrandom(2, 6)``    ``res2 := intrandom(49, 50)``    ``res3 := intrandom(120, 98)`` ` `    ``// Displaying results``    ``fmt.Println(``"Result 1: "``, res1)``    ``fmt.Println(``"Result 2: "``, res2)``    ``fmt.Println(``"Result 3: "``, res3)``}`

Output:

```Result 1:  5577006791947779418
Result 2:  8674665223082153650
Result 3:  6129484611666146039
```

My Personal Notes arrow_drop_up