Explore fun brain teasers to hone your logic, critical thinking, and problem-solving skills. Gain insights into Go and practice to avoid future mistakes.

go.tar.gz

Go lang

Who knew puzzles could be fun? Puzzles and brain teasers are a great way to practice your critical thinking and improve your logic and problem-solving skills. This course provides a basic understanding of Go. The teasers in this course will help you practice what you already know and help avoid future mistakes.

Go Brain Teasers

# Try it yourself ##
Try executing the code below to see the result for yourself.

package main

import (
	"fmt"
)

func main() {
	n := nil
	fmt.Println(n)
}



# Explanation ##
In Go, `nil` is not a type but a reserved word. A variable initialized to `nil` must have a
type. If, for example, we change the assignment to `var n *int = nil`, the code will compile since now `n` has a type.

Here are some places where `nil` is used:

• The zero value for `map`, `slice`, and `chan` is `nil`.

• We can’t compare slices or maps using `==`; we can only compare them
to `nil`.

• Sending to or receiving from a `nil` channel will block forever. We can use
this to avoid a busy wait.

Before We Begin

Puzzles

Wrapping Up

Puzzle 4 Explanation: Go Types

Try it yourself