Writing first Go program - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

Go

package main

import "fmt"

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

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

APrintln

BPrint

CPrintf

DPrintfln

Attempts:

3 left

💡 Hint

Common Mistakes

Using fmt.Print does not add a new line after printing.

Typo in function name like Printfln causes errors.

The fmt.Println function prints the text followed by a new line.

2fill in blank

medium

Complete the code to declare the main package in Go.

Go

[1] main

func main() {
    // program starts here
}

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

Afunc

Bmain

Cimport

Dpackage

Attempts:

3 left

💡 Hint

Common Mistakes

Writing 'func' instead of 'package' at the top.

Omitting the package declaration causes errors.

The package keyword declares the package name at the top of a Go file.

3fill in blank

hard

Fix the error in the function declaration to make it valid Go code.

Go

func [1]() {
    fmt.Println("Hello")
}

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

Amain

BMain

Cmain()

Dfunc

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'Main' instead of 'main'.

Adding parentheses after the function name in declaration.

The main function must be named exactly main without parentheses in the declaration.

4fill in blank

hard

Fill both blanks to import the fmt package and print a message.

Go

package main

import [1]"fmt"[2]

func main() {
    fmt.Println("Welcome to Go!")
}

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

A(

B"

C)

D[

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets instead of parentheses.

Using quotes alone without parentheses for multiple imports.

Use parentheses to import packages in a block: import ("fmt").

5fill in blank

hard

Fill all three blanks to create a map of string keys to int values with one entry.

Go

package main

func main() {
    scores := map[[1]][2]{
        "Alice": [3],
    }
}

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

Astring

Bint

C100

Dfloat64

Attempts:

3 left

💡 Hint

Common Mistakes

Using float64 instead of int for map values.

Using incorrect key type like int instead of string.

The map keys are strings, values are integers, and the value assigned is 100.