Calling C code from Go

Go allows you to call C code because there are times when the only way to perform some tasks, such as communicating with a hardware device or a database server, is by using C. Nevertheless, if you find yourself using this capability many times in the same project, you might need to reconsider your approach and your choice of programming language.

Talking more about this capability in Go is beyond the scope of this book. What you should remember is that most likely, you will never need to call C code from your Go program. Nevertheless, should you wish to explore this Go feature, you can start by visiting the documentation of the cgo tool at https://golang.org/cmd/cgo/ as well as by looking at the code found at https://github.com/golang/go/blob/master/misc/cgo/gmp/gmp.go.