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How to Get Intn 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 non-negative pseudo-random number in [0, n) of int type from the default source with the help of the Intn() 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 Intn() function. This method will panic if the value of n is <= 0.

Syntax:

`func Intn(n int) int`

Let us discuss this concept with the help of the given examples:

Example 1:

 `// Golang program to illustrate``// how to Get Intn Type Random ``// Number``package main`` ` `import (``    ``"fmt"``    ``"math/rand"``)`` ` `// Main function``func main() {`` ` `    ``// Finding random numbers of int type``    ``// Using Intn() function``    ``res_1 := ``rand``.Intn(7)``    ``res_2 := ``rand``.Intn(8)``    ``res_3 := ``rand``.Intn(2)`` ` `    ``// 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:  6
Random Number 2:  7
Random Number 3:  1
```

Example 2:

 `// Golang program to illustrate how ``// to get Intn Type Random Number``package main`` ` `import (``    ``"fmt"``    ``"math/rand"``)`` ` `// Function``func intnrandom(value_1, value_2 ``int``) ``int` `{``    ``return` `value_1 + value_2 + ``rand``.Intn(4)`` ` `}`` ` `// Main function``func main() {`` ` `    ``// Getting result from Intnrandom() function``    ``res1 := intnrandom(10, 3)``    ``res2 := intnrandom(44, 59)``    ``res3 := intnrandom(130, 50)`` ` `    ``// Displaying results``    ``fmt.Println(``"Result 1: "``, res1)``    ``fmt.Println(``"Result 2: "``, res2)``    ``fmt.Println(``"Result 3: "``, res3)``}`

Output:

```Result 1:  14
Result 2:  106
Result 3:  183
```

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