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Channels

This Go code demonstrates the use of channels for communication between goroutines. Let's break it down with inline comments:
package main
import "fmt"
func main() {
// Creating a channel named 'messages' for communication between goroutines
messages := make(chan string)
// Launching a goroutine with an anonymous function to send a message into the channel
go func() {
messages <- "ping" // Sending "ping" into the 'messages' channel
}()
// Receiving the message from the channel and storing it in the variable 'msg'
msg := <-messages
// Printing the received message
fmt.Println(msg)
}

Output

ping
Explanation:
  1. 1.
    package main: Indicates that this Go file belongs to the main executable package.
  2. 2.
    import "fmt": Imports the "fmt" package for formatting and printing.
  3. 3.
    func main() { ... }: The main function, where the execution of the program begins.
  4. 4.
    messages := make(chan string): Creates a channel named 'messages' for communication between goroutines. The type of data that can be sent through this channel is a string.
  5. 5.
    go func() { messages <- "ping" }(): Launches a new goroutine with an anonymous function. This function sends the string "ping" into the 'messages' channel. This is an example of sending data to a channel.
  6. 6.
    msg := <-messages: Receives a message from the 'messages' channel and assigns it to the variable 'msg'. This is an example of receiving data from a channel.
  7. 7.
    fmt.Println(msg): Prints the received message, which is "ping" in this case.
In summary, this code demonstrates the basic usage of channels for communication between goroutines. The main goroutine creates a channel, launches another goroutine to send a message into the channel, and then receives and prints the message in the main goroutine. This showcases how channels facilitate communication and synchronization between concurrently running goroutines.