Channels & Select Operations

Go implements communication safety using channels: **"Do not communicate by sharing memory; instead, share memory by communicating."**

• `ch <- val`: Sends a value into a channel.
• `val := <-ch`: Receives a value from a channel.
• Synchronization: Unbuffered channel operations block execution automatically until both sender and receiver are ready, synchronizing the threads without using locks.

Let's run a program communicating values between threads using channels:

package main

import "fmt"

func computeSum(a, b int, ch chan int) {
    sum := a + b
    ch <- sum // Send calculated sum into channel
}

func main() {
    // Initialize channel of integers using make
    ch := make(chan int)

    // Launch worker goroutine
    go computeSum(15, 25, ch)

    // Receive value from channel (blocks main thread until value is sent)
    result := <-ch
    fmt.Println("Result received from channel: ", result)
}