main package and main function in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare the main package.

Go

package [1]

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

Afmt

Bhttp

Cos

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Using other package names like 'fmt' or 'os' instead of 'main'.

Forgetting to write 'package' keyword.

The main package is declared with package main. This tells Go this is an executable program.

2fill in blank

medium

Complete the code to declare the main function.

Go

func [1]() {
    // program starts here
}

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

Amain

Bstart

Cinit

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Naming the function something other than 'main'.

Forgetting the parentheses after the function name.

The main function is declared as func main(). This is the entry point of the program.

3fill in blank

hard

Fix the error in the code to make it a valid Go program with main package and main function.

Go

package main

func [1]() {
    println("Hello, Go!")
}

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

Amain

Bhello

Cstart

DMain

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'Main' instead of 'main'.

Using other function names like 'start' or 'hello'.

The main function must be named exactly 'main' with a lowercase 'm'. Go is case-sensitive.

4fill in blank

hard

Fill both blanks to create a valid Go program that prints "Welcome!".

Go

package [1]

func [2]() {
    println("Welcome!")
}

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

Amain

Bfmt

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for package and function.

Using 'fmt' as package name which is a library, not the main package.

The package must be 'main' and the function must be 'main' to run the program.

5fill in blank

hard

Fill all three blanks to create a Go program that prints "Go is fun!" using the main package and main function.

Go

package [1]

func [2]() {
    [3]("Go is fun!")
}

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

Amain

Bprintln

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'print' instead of 'println' which is the correct built-in function.

Using wrong package or function names.

The package and function must be 'main'. Use 'println' to print the message.