Go program structure - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare the package name.

Go

package [1]

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

Afunc

Bmain

Cfmt

Dimport

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'fmt' or 'import' as package name

Forgetting the package declaration

The first line in a Go program declares the package name. For an executable program, it should be main.

2fill in blank

medium

Complete the code to import the standard library package for formatted I/O.

Go

import "[1]"

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

Afmt

Btime

Cmath

Dos

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'os' or 'math' instead of 'fmt' for printing

Forgetting quotes around package name

The fmt package is used for formatted input and output in Go.

3fill in blank

hard

Fix the error in the function declaration to define the main function.

Go

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

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

Amain

BMain

Cstart

Dfunc

Attempts:

3 left

💡 Hint

Common Mistakes

Capitalizing 'Main'

Using other function names like 'start'

The entry point of a Go program is a function named main with lowercase 'm'. It must be spelled exactly as 'main'.

4fill in blank

hard

Fill both blanks to complete the Go program that prints a message.

Go

package [1]

import "[2]"

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

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

Amain

Bfmt

Cos

Dmath

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong package or import names

Forgetting to import 'fmt'

The package must be 'main' for an executable program, and the import must be 'fmt' to use Println.

5fill in blank

hard

Fill all three blanks to create a complete Go program that prints a greeting.

Go

package [1]

import "[2]"

func [3]() {
    fmt.Println("Hello, world!")
}

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

Amain

Bfmt

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' as function name

Wrong package or import names

The package name is 'main', the import is 'fmt', and the function name is 'main' to run the program.