In golang, it is easy to get the size of file, but getting the size of a directory is a bit complex. Here in this article we will use os.Open() function , walk function as well as readdir() function to get the size of a directory. Syntax funcReadDir(dirname string) ([]fs.FileInfo, error) The ReadDir() function is present in os package and is used to read the directory. The function accepts one argument which is the name of the directory which is to be read and returns a list FileInfo for directory’s content. If an error is generated while reading the ... Read More

In this golang article, we will write a go language program to display all the directories in a given directory using the Go programming language using the open() function, using the walk function as well as using the readdir function. Method 1 In this Example we will write a go language program to display all the directories in a directory by using the open() function present in os package. One of the simplest methods to display the directories in a given directory is to use the os.Open() function. Example package main import ( "fmt" ... Read More

In this golang article we will write a go language program to search for a file in a directory using os.Open() function as well as using the ioutil.ReadDir() function. Searching for a specific file in golang can be very difficult task, if you have a lot of files to search, but golang makes this a easy task with its built In functions, we will see the use case of such functions in this article. Algorithm First, we need to import the "fmt" and "os" packages. Then, start the main() function. Inside the main() define the name of the directory ... Read More

In this golang article, we will delete a directory in Golang using thhe os.Remove() function as well as using os.RemoveAll() function. There are many inbuilt functions present in go to remove a directory, and we will discuss two of such methods in this program. In computer languages a directory is a container or a file system object that contains information about files and other directories. Syntax funcRemove(file_name string) error The remove function is present in os package and is used to remove a particular file or directory. The function accepts one argument which is the name of the file ... Read More

In this golang article we will write a program to create directories recursively using os.MkdirAll() function as well as using recursion. One of the main use cases of Go is to create scalable and concurrent applications. Method 1 In this Example we will write a go language program to create directories recursively by using MkdirAll() function present in os package. The simplest way to create directories recursively in Golang is by using this function. This function takes a file path as an argument and creates all the missing directories in the path. Syntax funcMkdirAll(path string, perm FileMode) error The ... Read More

In this golang article, we can send email using SMTP’s SendMail method, as well as using SMTP with go mail method, SMTP stands for simple mail transfer protocol. This protocol is used to send messages between the servers. The net/smtp package provides a medium to send messages hence it must be imported in the program. Syntax smtp.PlainAuth() This function belongs to the smtp and is primarily used to authenticate with the SMTP server using plain authentication. smtp.SendMail() This function is present in the SMTP package. It is used to send the message from the SMTP server. smtpClient.Auth() ... Read More

In this Go language article, we will write programs to implement recursive anonymous function by generating fibonacci numbers, by using cache, as well as factorial of a number. An anonymous function is the function which does not have its name and it calls itself within its own body and when repeated calls are made, it called as recursive functions. Method 1 In this Example, we will generate Fibonacci numbers recursively by using an anonymous function. Here, fibo is assigned to the anonymous function with func and an input parameter. Algorithm Step 1 − Create a package main and declare ... Read More

In this golang article, we will learn the overview testing package using two test functions as well as using iteration. Testing is of two types: manual testing and automated testing, manual testing is done manually with defined set of test cases whereas in automated testing a program is created with code to test the software. Here we will use two test function as well as iteration method to show the importance of testing package. Algorithm Step 1 −Import the required packages in the program Step 2 − Create a test function in which the function will be called which ... Read More

In this golang article, we will write Go language programs to depict short variable declaration operator using var keyword and variable declaration. In shorthand variable, initialization is done at the time of declaration where it’s not necessary in var keyword. Here, we will use a string method, as well as a count variable method to depict short variable declaration. Algorithm Step 1 − Import the required packages in the program Step 2 − Create a main function Step 3 − In the main use short variable declaration to create strings Step 4 − Print the strings created via shorthand ... Read More

In Golang, os and io packages are used for performing various file-r operations like editing, copying, creating, and deleting. In this article, we are going to see three different Examples to create an empty file. In the first Example we will use os.Create from the os package, in the second Example we will use WriteFile function from ioutil package is used and in the third Example we will use NewWriter function from bufio package is used. Syntax os.Create() This function comes from the os package. It helps in the creation of a new file. The filename is given as ... Read More