Arrays

Where is the 2nd variable below stored in memory?

// Let's say that first variable below is stored in this memory location: 20th
var (
    first  int32 = 100
    second int32 = 150
)

21
22
24
It can be stored anywhere CORRECT

4: That's right. It can be anywhere. Because, there's no guarantee that variables will be stored in contiguous memory locations.

Where is the 3rd element of the following array stored in memory?

//
// Let's say that:
// nums array is stored in this memory location (cell): 500th
//
// So, this means: nums[0] is stored at 500th location as well.
//
var nums [5]int64

3
2
502
503
516 CORRECT

2: Nope, that's the index of an element.

3, 4: 500+index? You're getting closer.

5: Perfect. Array elements are stored in contiguous memory locations (cells). Here, the array's location is 500, and each element is 8 bytes (int64). So, 1st element: 500th, 2nd element: 508th, 3rd element: 516th, and so on. Formula: 516 = 500 + (8 * (3 - 1)).

How many values the following variable represents?

var gophers [10]string

0
1 CORRECT
2
10

2: That's right! A variable can only store one value. Here, it stores a single array value with all its elements. However, through the gophers variable, you can access to 10 string values individually of that array.

4: That's the length of the array. It's not the number of values that the gophers variable represents.

?

text CORRECT
text

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