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.

package main

import (
	"fmt"
)

func main() {
	msg := "π = 3.14159265358..."
	fmt.Printf("%T ", msg[0])
	for _, c := range msg {
		fmt.Printf("%T\n", c)
		break
	}
}




# Explanation ## 
Go strings are UTF-8 encoded. Go will access the underlying `[]byte` when we access a string with `[]` or with `len`. The `byte` is a type in Go that’s aliased to `uint8`.

When we iterate over a string in Go, we’ll get the Unicode character called **rune**, an alias to `int32`. This is because the characters in UTF-8 can be up to 4 bytes.

We'll see the numeric value if we print a rune using the `%v` verb. Use the `%c` verb to display the character. If we see `?` or other characters instead of the rune you’re trying to print, the current font does not support it. No single font can display all fonts in the Unicode specification.

There are several ways to write a rune literal in the Go language. Let’s have a look at the following section:




Before We Begin

Puzzles

Wrapping Up

Puzzle 20 Explanation: Go Rune

Try it yourself