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"
	"time"
)

func main() {
	timeout := 3
	fmt.Printf("before ")
	time.Sleep(timeout * time.Millisecond)
	fmt.Println("after")
}



# Explanation ##

When we write `timeout := 3`, the Go compiler will do type inference. In this
case, it will infer that timeout is an `int`. Then in **line 11**, we multiply timeout (`int`
type) with `time.Millisecond` (which is of `time.Duration type`), which is not allowed.

We have several options to fix this.

Change the type of timeout to `time.Duration` (**line 9**):

```
var timeout time.Duration = 3 
```
Use a type conversion to convert timeout to `time.Duration` (**line 11**):

``` 
time.Sleep(time.Duration(timeout) * time.Millisecond) 
```



Understand how types can make differences. 

Puzzle 6 Explanation: Timeout

Understand how types can make differences.

Before We Begin

Puzzles

Wrapping Up

Puzzle 6 Explanation: Timeout

Try it yourself

Explanation