Lesson 3

Special Character Sequences in Go

Topic Overview and Actualization

Hello everyone! Today's journey will explore Special Character Sequences in Go. We'll delve into widely-used escape sequences – like newline or tab.

Introduction to Special Character Sequences

In Go, escape sequences are characters prefixed with a backslash (\), each having a unique behavior. They're convenient for creating line breaks, inserting tab spaces, or including a backslash or quotes in a string.

Here's an example of the newline character (\n) in use:

Go
1package main 2 3import "fmt" 4 5func main() { 6 fmt.Println("Programming is fun!\nLet's learn Go together.") 7} 8// Output: 9// Programming is fun! 10// Let's learn Go together.

The output appears on two distinct lines!

Understanding Newline Character

The \n serves as your in-code line breaker, allowing you to split the output efficiently and improve readability. Observe it at work:

Go
1package main 2 3import "fmt" 4 5func main() { 6 fmt.Println("Go\nProgramming") 7 // Output: 8 // Go 9 // Programming 10}

As you can see, "Go" and "Programming" are neatly broken into separate lines, all thanks to \n.

Exploring Tab and Backslash Characters

In Go, \t is used to insert a tab space. This is handy for aligning output or creating gaps in your text.

Take a look at this illustration:

Go
1package main 2 3import "fmt" 4 5func main() { 6 fmt.Println("Go\tProgramming") 7 // Output: Go Programming (with a tab space in between) 8}

To include a backslash in your string, use \\.

Go
1package main 2 3import "fmt" 4 5func main() { 6 fmt.Println("Go\\Programming") 7 // Output: Go\Programming 8}

Note that there's a backslash in the output because we used \\. A single backslash inside the string is not permitted and would result in a compilation error, as the backslash is seen as a special character.

Working with Quotes in Strings

Do you want to include quotes inside a string? Go enables this with \" for double quotes. Take a look below:

Go
1package main 2 3import "fmt" 4 5func main() { 6 fmt.Println("Go \"Programming\" is fun") 7 fmt.Println("It's okay to say \"Go is cool!\"") 8 // Output: 9 // Go "Programming" is fun 10 // It's okay to say "Go is cool!" 11}

The output demonstrates how \" can seamlessly introduce quotes into strings! Note that we don't need to use \ for a single quote. ' is not a special character!

Lesson Summary and Practice

Great job! You've now mastered the special character sequences in Go — newline (\n), tab (\t), backslash (\\), and quotes (\"). With these in your arsenal, you're equipped to handle many string manipulation tasks in real-world programming scenarios. Practice exercises are up next. Apply what you've learned to reinforce your understanding. Keep practicing and enjoy programming!

Enjoy this lesson? Now it's time to practice with Cosmo!

Practice is how you turn knowledge into actual skills.