**primes := [6]int{2, 3, 5, 7, 11, 13}**

used in “slices” explanation present on “tour” at location / url / Context: http://127.0.0.1:3999/moretypes/7

**I am more concerned about the observation 2 stated below**

**Observation 1:**

Let us assume we want to slice value from “primes” array. Hence, we will write some thing like below, with N and M being two integer numbers:

var s[]int = **primes[N:M]**

where:

**N = Low bound =** Position of the first number to be copied to slice. Here we use C style reference, hence the position count starts from 0

**M = Higher bound**

There is however confusion about what value of M should be used:

i. M can be a numeric number that informs how many values need to be copied

ii. M can be the position of the last number that should be a part of the slice:

a. assuming that the first value in the array is at position 0

b. assuming that the first value in the array is at position 1

Based on shared example (shared on tour), the possible **description for M is ii.b**

**Queries:**

A. Why cannot N and M count from 0? Why does N start count from 0 and M from 1?

B. Why cannot we use M as the number of elements we want to keep in slice?

**Observation 2:**

Also why error is not thrown for “var s[]int = prime[6:6]” (as the permitted values for low bound (i.e. N) are 0 through 5)?