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Golang program to create the unidirectional channel

Here, we are going to learn how to create the unidirectional channel in Golang (Go Language)?
Submitted by Nidhi, on April 03, 2021 [Last updated : March 04, 2023]

How to create the unidirectional channel in Golang?

Problem Solution:

In this program, we will create a unidirectional channel, here we will allow only sending values to the channel.

Program/Source Code:

The source code to create a unidirectional channel is given below. The given program is compiled and executed successfully.

Golang code to create the unidirectional channel

// Golang program to create the
// unidirectional channel

package main

import "fmt"

func main() {
	// Channel with send only.
	msg := make(chan<- string)

	go func() { msg <- "Hello World" }()

	// Below statement will generate an error because
	// here the only channel allows sending only.
	// fmt.Println(<-msg)

	fmt.Println("Program finished")
}

Output:

Program finished

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt package to formatting related functions.

In the main() function, we created a unidirectional channel that allows only sending messages to the channel.