yes, I am beginner and sorry for my mistake
but ... when I print input data before I start doing anything

func SquareOrSquareRoot(arr []int) []int{
fmt.Println(arr)
...

then I get on terminal [88 48 60 82]

and in log:
Expected
<[]int | len:4, cap:4>: [7744, 2304, 3600, 6724]
to equal
<[]int | len:4, cap:4>: [88, 48, 60, 82]

so expected ouput is equal to input array?

ok ... so to test this case I changed my function to

func SquareOrSquareRoot(arr []int) []int{
fmt.Println("input data", arr)
return arr
}

and in log:

input data [88 48 60 82]
Expected
<[]int | len:4, cap:4>: [88, 48, 60, 82]
to equal
<[]int | len:4, cap:4>: [7744, 2304, 3600, 6724]

so 2 different expected outputs for same input?

EDIT: ok, my mistake ... I dont catch "The input array should not be modified!"
that was my mistake ... thanks for patience

this is still valid issue ... Please can anyone fix it?

thanks for raising this, I couldn't understand what am I missing!