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Golang program to check the channel is empty or not

Here, we are going to learn how to check the channel is empty or not in Golang (Go Language)?
Submitted by Nidhi, on April 04, 2021 [Last updated : March 04, 2023]

How to check the channel is empty or not in Golang?

Problem Solution:

In this program, we will create two bidirectional channels and then we will check the channel is empty or not?

Program/Source Code:

The source code to check the channel is empty or not is given below. The given program is compiled and executed successfully.

Golang code to check the channel is empty or not

// Golang program to check the channel is
// empty or not

package main

import "fmt"

func main() {
	//Create a bidirection channel with capacity 2.
	msg1 := make(chan string, 2)

	if len(msg1) == 0 {
		fmt.Println("Channel msg1 is empty")
	} else {
		fmt.Println("Channel msg1 is not empty")
	}

	//Create a bidirection channel with capacity 3.
	msg2 := make(chan string, 3)
	msg2 <- "Hello"
	msg2 <- "Hiiii"

	if len(msg2) == 0 {
		fmt.Println("Channel msg2 is empty")
	} else {
		fmt.Println("Channel msg2 is not empty")
	}
}

Output:

Channel msg1 is empty
Channel msg2 is not empty

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 two bidirectional channels and then we checked the channel is empty or not and print the appropriate message on the console screen.

Golang Channels Programs »

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