Both are read from environment variables and set to some default value if not present.
Contribute to golang/go development by creating an account on GitHub. Go env is not printing the GOGC value. In golang, how do you assign a default value if an environment variable isn't set? Configuring Golang Applications Using Environment Variables. I tried an if statement based on os.Getenv being empty, but that doesn't seem to work due to the scope of variable assignment within an if statement. We know that the default value for GOGC is 100. is there a way to get the path of a folder using Windows Recognized Environment Variables values with Go?. It is often asked why Go does not have a ternary operator. In python I could do mongo_password = os.getenv('MONGO_PASS', 'pass') where pass is the default value if MONGO_PASS env var isn't set.. But how will get the value from the command prompt. The Go programming language. The Go FAQ says, The if-else form, although longer, is unquestionably clearer. A language needs only one conditional control flow construct. os.Setenv("NAME", "Flavio") os.Unsetenv() unsets an environment variable. how to check the value of GOGC / GC percentage ? Use os.LookupEnv() to be able to do that. I know Python can do it, but I can't figure it out using Go. name := os.Getenv("NAME") os.Setenv() sets an environment variable. It’s not possible to determine not set or empty. os.Getenv() gets an environment variable. Parsing environment variables with Go is simple, thanks to the standard library os package.