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Go program to call a Goroutine with another normal function concurrently

Here, we are going to learn how to call a Goroutine with another normal function concurrently in Golang (Go Language)?
Submitted by Nidhi, on March 23, 2021 [Last updated : March 04, 2023]

How to call a Goroutine with another normal function concurrently in Golang?

Problem Solution:

In this program, we will create two user-defined functions and call one function as a goroutine and another as a normal function concurrently to print messages on the console screen.

Program/Source Code:

The source code to call a Goroutine with another normal function concurrently is given below. The given program is compiled and executed successfully.

Golang code to call a Goroutine with another normal function concurrently

// Go program to call a Goroutine with another
// normal function concurrently

package main

import "fmt"
import "time"

func PrintNum() {
	for i := 0; i < 4; i++ {
		time.Sleep(1 * time.Second)
		fmt.Printf("%d\n", i)
	}
}

func ShowMsg(msg string) {
	for i := 0; i < 4; i++ {
		time.Sleep(1 * time.Second)
		fmt.Printf("%s\n", msg)
	}
}

func main() {
	//Goroutine call
	go ShowMsg("Hello World")

	//normal function call
	PrintNum()
}

Output:

Hello World
0
Hello World
1
Hello World
2
Hello World
3

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 and time packages to use time and fmt related functions.

In the main() function, we created two user-defined functions PrintNum(), ShowMsg(). Then we called PrintNum() as a normal function and ShowMsg() as a goroutine for concurrent execution.

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