How to Get Int31 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 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 the non-negative pseudo-random number of 31-bit integer as an int32 type from the default source with the help of the Int31() 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 Int31() function.
Syntax:
func Int31() int32
Let us discuss this concept with the help of the given examples:
Example 1:
package main
import (
"fmt"
"math/rand"
)
func main() {
res_1 := rand.Int31()
res_2 := rand.Int31()
res_3 := rand.Int31()
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: 1298498081
Random Number 2: 2019727887
Random Number 3: 1427131847
Example 2:
package main
import (
"fmt"
"math/rand"
)
func int31random(value_1, value_2 int32) int32 {
return value_1 + value_2 + rand.Int31()
}
func main() {
res1 := int31random(2, 9)
res2 := int31random(47, 20)
res3 := int31random(400, 98)
fmt.Println("Result 1: ", res1)
fmt.Println("Result 2: ", res2)
fmt.Println("Result 3: ", res3)
}
|
Output:
Result 1: 1298498092
Result 2: 2019727954
Result 3: 1427132345
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