Golang : Populate slice with sequential integers example

Helping out a friend here, putting the code example down here for future references. Basically, he needs to generate a slice with sequential integers such as [1,2,3,4,5] and also need to generate slice that have negative numbers such as [2,1,0,-1,-2,-3,-4,-5].

The code that follows is self-explanatory. Here you go!

 package main

 import (
 "fmt"
 )

 func sequentialInt(start, end int) []int {
 var size int
 // check if end > start
 if end > start {
 size = end - start
 size = size + 1 // because counting starts from 0
 intSlice := make([]int, size)

 for i := 0; i < len(intSlice); i++ {
 intSlice[i] = start + i
 }
 return intSlice

 } else {
 size = start - end
 size = size + 1 // plus 1 because counting starts from 0
 intSlice := make([]int, size)

 for i := 0; i < len(intSlice); i++ {
 intSlice[i] = start - i
 }
 return intSlice
 }

 }

 func main() {
 numbers := sequentialInt(0, 10)
 fmt.Println(numbers)

 numbers2 := sequentialInt(-10, 5)
 fmt.Println(numbers2)

 // test for reverse order
 numbers3 := sequentialInt(9, -11)
 fmt.Println(numbers3)

 }

Output:

[0 1 2 3 4 5 6 7 8 9 10]

[-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5]

[9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11]

Happy coding!

References:

https://www.socketloop.com/tutorials/golang-generate-random-integer-or-float-number