You need to import the ‘io/ioutil’ package for this.
fileBytes, err := ioutil.ReadFile("/path/to/your/file")
This will return a slice of bytes as the first return argument, not a string.
You can convert it easily:
fileAsString := string(fileBytes)
You can open a file using the ‘os’ package:
file, err := os.Open("/your/file/here")
You can also use the standard input, for example:
file := os.Stdin
If you want to read a line from either, you need the buffered reader from the package ‘bufio’:
bufferedReader := bufio.NewReader(file)
Now you can use the ReadString method, with a delimiter as the argument, to read a string from such:
str := bufferedReader.ReadString('\n')
This will give us a line from the file, including the delimiter we specified.