Type inference in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable with type inference.

Go

var x = [1]

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

Avar

Bint

C"Hello, Go!"

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using a type name instead of a value after the equals sign.

Trying to declare type explicitly when using type inference.

In Go, you can declare a variable with type inference by assigning a value directly. Here, var x = "Hello, Go!" lets Go infer that x is a string.

2fill in blank

medium

Complete the code to declare and initialize a variable using short variable declaration with type inference.

Go

count [1] 10

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

A==

B=

Cvar

D:=

Attempts:

3 left

💡 Hint

Common Mistakes

Using single equals sign which is assignment, not declaration.

Using double equals which is a comparison operator.

The short variable declaration count := 10 declares count and lets Go infer its type as int.

3fill in blank

hard

Fix the error in the code by completing the variable declaration with type inference.

Go

var pi [1] 3.14

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

A=

B:=

Cfloat64

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using := with var keyword causes syntax error.

Using == which is a comparison operator.

When using var with explicit variable name, you must use = to assign a value. Type inference happens automatically.

4fill in blank

hard

Fill both blanks to declare a variable with type inference and assign a boolean value.

Go

isReady [1] [2]

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

A:=

Btrue

Cfalse

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using = instead of := for declaration.

Using false instead of true if the goal is to assign true.

Using isReady := true declares isReady with type inferred as bool and assigns it the value true.

5fill in blank

hard

Fill both blanks to create a map with type inference and initialize it with values.

Go

scores := map[string]int{"Alice": {BLANK_2}}, "Bob": {{BLANK_2}}

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

A{

B90

C85

D}

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the opening or closing curly braces.

Using string values instead of integers for scores.

The code scores := map[string]int{"Alice": 90, "Bob": 85} declares a map with string keys and int values, using type inference for scores.