Golang : Populate slice with sequential integers example



Tags : golang sequential-integers negative-numbers slice array

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

  See also : Golang : Generate random string



Tags : golang sequential-integers negative-numbers slice array

By Adam Ng

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