Why Go is widely used - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, Go!".

Go

package main

import "fmt"

func main() {
    fmt.[1]("Hello, Go!")
}

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

APrintfln

BPrint

CPrintf

DPrintln

Attempts:

3 left

💡 Hint

Common Mistakes

Using Print instead of Println which does not add a newline.

The Println function prints the text with a newline at the end.

2fill in blank

medium

Complete the code to declare a variable named 'count' of type int with value 10.

Go

package main

func main() {
    var count [1] = 10
}

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Aint

Bstring

Cfloat64

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using string or float64 which are not integer types.

The variable count should be of type int to hold integer values.

3fill in blank

hard

Fix the error in the function signature to accept an integer parameter named 'n'.

Go

package main

func printNumber([1]) {
    // function body
}

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

Aint n

Bn: int

Cn int

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using int n which is incorrect in Go.

In Go, function parameters are declared as name type, so n int is correct.

4fill in blank

hard

Fill both blanks to create a map from string to int with one key-value pair.

Go

package main

func main() {
    m := map[[1]][2]{
        "age": 30,
    }
}

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

Astring

Bint

Cfloat64

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using float64 or bool for keys or values which is incorrect here.

The map keys are strings and values are integers, so string and int are correct.

5fill in blank

hard

Fill all three blanks to create a slice of integers and append 5 to it.

Go

package main

import "fmt"

func main() {
    nums := [][1]{1, 2, 3}
    nums = append(nums, [2])
    fmt.[3](nums)
}

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

Aint

B5

CPrintln

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using string instead of int for the slice type.

Forgetting to append the correct value.

The slice holds integers, so int is correct. We append the number 5, and print with Println.