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Breakpoint in runtime package in go

In this tutorial, We are going to learn about Breakpoint in runtime package in go with example and in details.

The breakpoint function runtime package in go is defined as ‘runtime.Breakpoint()‘ in the runtime package. This function acts as a breakpoint for the debugger, pausing the execution of your program at a specific point. This allows you to inspect variables, evaluate expressions and step through the code to understand the program’s behaviour better.


func Breakpoint()

Usage of the Breakpoint Function:

To use the breakpoint function in your Go code, you need to import the runtime package and call the ‘runtime.Breakpoint()‘ function in your code where you want the debugger to pause.

It’s important to note that the breakpoint function is a no-op (no operation) if a debugger is not attached to the process. In other words, your program will continue to run as usual if you don’t have a debugger running with your code.


package main

import (




func main() {

	fmt.Println("Program execution started.")

	// First breakpoint

	for i := 1; i <= 5; i++ {

		fmt.Printf("Loop iteration: %d\n", i)

		// Second breakpoint inside the loop
		if i == 3 {




	fmt.Println("Program execution completed.")


In the example above, we have two breakpoints – one before entering the loop and one inside the loop when the loop variable ‘i’ is equal to 3. When you run this code with a debugger attached, it will pause at the breakpoints, allowing you to inspect the state of the program.

To execute the above code with a debugger like Delve, you can use the following command:

dlv debug <your_go_file>.go

To learn more about golang, You can refer given below link:


Posted in golang, packages, runtime

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