Basic Golang (Go)

Question 1

Declare a variable of type string. (3 methods)

Answer 1

var myStringName string

var myStringName = “Hello there”

myStringName := “Hello there”

Question 2

Declare a variable of type integer (3 methods)

Answer 2

var myIntegerName int

var myIntegerName = 5

myIntegerName := 5

Question 3

Declare a variable of type float (3 methods)

Answer 3

var myFloatName float32

var myFloatName = 5.05

myFloatName := 5.05

Question 4

Declare a variable of type boolean (3 methods)

Answer 4

var isThing bool

isThing bool = true

isThing := true

Question 5

Declare a variable of type rune (3 methods)

Answer 5

var someRune rune

someRune rune = “🐻”

someRune := “🐻”

Question 6

What is an anonymous function and when is it typically used?

Answer 6

In Go, an anonymous function, also known as a function literal, is a function defined without a name. It can be assigned to a variable, passed as an argument to another function, or executed directly. Anonymous functions are useful for short, one-time operations or when a function is needed only within a specific scope.

Question 7

Using an example, assign a variable a value equal to an anonymous function where the value is “a” plus “b”

Answer 7

add := func(a, b int) int {
return a + b
}

result := add(5, 3)

Question 8

A basic function named calcPrice that takes one integer (qty) and returns a float64.

Answer 8

func calcPrice(qty int) float64{
return qty * 0.99
}

Question 9

A basic function named calcPrice that takes one integer (qty), two float64 (price and discount) and returns a float64 and boolean.

Answer 9

func calcPrice(qty int, price, discount float64) (float64, bool) {
cost := (qty * price) * (1 - discount)
isExpensive := false

return cost, isExpensive }

Question 10

A basic struct named “car” with properties of brand, model, and mileage.

Answer 10

type car struct {
brand string
model string
mileage int
}