为什么我的阵列不增长？

Question

I am trying to generate numbers that are factors of 3 || 5 in an array.

Here is a copy of my code:

package main

import "fmt"

func main() {

    i := 0

    for i < 1000 {
        var nums []int

        if i%3 == 0 || i%5 == 0 {
            nums := append(nums, i)
            fmt.Println(nums)
        }

        i++

    }
}

Unfortunately, this isnt going as planned as it appears to by over writing the value at nums[0]. Here a the last few values of my terminal output.

[981]
[984]
[985]
[987]
[990]
[993]
[995]
[996]
[999]

What am I doing wrong?

UPDATE

Also tried this:

var nums []int // initialize the slice outside for loop
for i < 1000 {
    if i%3 == 0 || i%5 == 0 {
        nums = append(nums, i) // append to the slice outside loop not create a new one using short variable declaration
        fmt.Println(nums)
    }
    i++
}

But got Same result

Answer 1

This is because you are creating a new variable of []int slice rather than appending to the created one outside if condition. Create the []int slice outside for loop and don't create a new variable using short declaration inside if condition.

package main

import (
    "fmt"
)

func main() {
    i := 0
    var nums []int
    for i < 1000 {
        if i%3 == 0 || i%5 == 0 {
            nums = append(nums, i)
        }
        i++
    }
    fmt.Println(nums)
    fmt.Println(len(nums), cap(nums)) // check for length and capacity of slice to know the size of slice after appending all data
}

Working Code on Go playground