The document is an introduction to the Go programming language, detailing its features, background, and usage. Developed at Google, Go combines the efficiency of statically typed languages with the productivity of dynamic languages, making it suitable for system programming and concurrent applications. It includes simple syntax, fast compilation, and built-in support for concurrency, with notable users such as Google and SoundCloud.

1. Happy Go Programing.!
A Short Introduction

2. Who am I
Pravin Mishra
Software Engineer @ShepHertz
Working on App42 PaaS (Public Cloud
Platform-as-a-Service)
Keep in touch - @pravinmishra88

3. What is Go?
- Go is a general-purpose language that bridges the gap
between efficient statically typed languages and
productive dynamic language.
- Go is an open source programming language. Go makes it
easy to build simple, reliable, and efficient software.

4. Go
• Initially developed at Google
• Created by Ken Thompson (Unix), Rob Pike
(Plan 9), and Russ Cox (libtask)
• Development started in 2007
• First release in 2009 (Fairly new!)

5. Features
●
Simple, minimal syntax
●
Fast compilation times
●
Easy concurrency support via goroutines
●
Garbage-collected
●
A flexible interface system
●
Statically linked binaries
●
Simple & Fun!

6. Language focus
• System programming
• Networked / multi-core
• Fast
• Compatible with C
• Best of static typed language and dynamic
typed languages

7. Hello World
package main
import "fmt"
func main() {
fmt.Println("Hello World")
}

8. Compiled language
$ go build hello.go
$ ls
hello hello.go
$ ./hello
Hello Word

9. Strong types
func main() {
var str string
var value int
str = "abc"
value = 123
str + value
}
$ go run strong_type.go
prog.go:8: invalid operation: str + value (mismatched types
string and int)
[process exited with non-zero status]

10. Static Typed
// types.go
func main() {
var a string
a = 123
}
$ go run types.go
prog.go:5: cannot use 123 (type int) as type string in
assignment
[process exited with non-zero status]

11. with dynamic casting
package main
import ( "fmt" )
func main() {
a := 123
fmt.Printf("Value of a: %d", a)
}
- Value of a: 123

12. User defined types
package main;
type Animal struct {
Name string
Age int
}
func main() {
var anaconda Animal
}

13. Compiler
• Uses GCC as back end
• Checks for unused packages and variables
• Checks types and return values

14. Go tools
• go fmt -> format your source code (cool!)
• go get -> manage and install your
dependencies
• go build / run -> compile and run your
program
• go test -> run your tests

15. Organizing code
package string_processing;
func Process(str string) {
// Code code code
}
package main
import "string_processing"
func main() {
string_processing.Process("foobar")
}

16. Who is using Go?
• Google (dl.google.com, youtube)
• SoundCloud
• Heroku
• CloudFlare
• Ubuntu

17. Wrapping up...
• Cool language
• Concurrent and networked
• Benefits from both dynamic and static typed languages
• Modern
• Give it a try!

18. Thank you.!