Map creation in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a map from string to int.

Go

var ages [1]

Drag options to blanks, or click blank then click option'

A[]int

Bmap[string]int

Cstruct{}

Dchan int

Attempts:

3 left

💡 Hint

Common Mistakes

Using slice syntax []int instead of map syntax.

Confusing map with channel or struct types.

The correct syntax to declare a map from string to int in Go is map[string]int.

2fill in blank

medium

Complete the code to initialize an empty map of string to int.

Go

ages := [1]

Drag options to blanks, or click blank then click option'

Amake(map[string]int)

Bnew(map[string]int)

Cmake([]int, 0)

D[]string{}

Attempts:

3 left

💡 Hint

Common Mistakes

Using make with slice type instead of map type.

Using new which returns a pointer, not a map.

To create an empty map in Go, use make(map[string]int).

3fill in blank

hard

Fix the error in the map initialization code.

Go

var ages = [1]

Drag options to blanks, or click blank then click option'

Amap[string]int

Bmap[string]int()

Cmap[string]int{}

Dmap[string]int[]

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of curly braces for map literals.

Using square brackets which are for slices or arrays.

To initialize a map with a literal, use map[string]int{}. Parentheses or brackets are incorrect here.

4fill in blank

hard

Fill both blanks to create a map with initial values.

Go

scores := [1]{
	"Alice": [2],
	"Bob": 90,
}

Drag options to blanks, or click blank then click option'

Amap[string]int

B85

C80

D[]int

Attempts:

3 left

💡 Hint

Common Mistakes

Using slice type instead of map type.

Using a string instead of an integer for the value.

The map type is map[string]int and the value for "Alice" is 85.

5fill in blank

hard

Fill all three blanks to create a map and add a new key-value pair.

Go

items := [1]{
	"pen": 5,
	"notebook": 10,
}
items[[2]] = [3]

Drag options to blanks, or click blank then click option'

Amap[string]int

B"eraser"

C3

D[]string

Attempts:

3 left

💡 Hint

Common Mistakes

Using slice type instead of map type.

Forgetting quotes around string keys.

Assigning a string value instead of an integer.

The map type is map[string]int. The new key is "eraser" and the value is 3.