Arrays

Declaration

We declare arrays using [] and specifying the length as follows

//
var scores[5] float64

The above array will contain only zeros 0 You can declare and initialize the array immediately as follows

// Define and initialize variables
var scores[5] float64{60, 70, 50, 90, 60}

or you can initialize them later as follows

// Declaration
var scores[5] float64
// Initialization
scores[0] = 70
scores[1] = 60
scores[2] = 80
scores[3] = 90
scores[4] = 100

Methods

var scores[5] int
len(scores) // Should return 5

Looping arrays

We use for loops to iterate through items in an array. The following are ways of looping an array.

var scores[5] float64{60, 70, 50, 90, 60}
var total float64 = 0

// len() function returns the length of the array
for i := 0; i < len(scores); i++ {
  total += scores[i]
}

for _, value := range scores {
  // use _ to represent the unused var, tells compiler we don't need this
  total += value
}