I need help on how to use packages in go. I am new to go programming.
Are you having any specific problems?
I have main.go file in a directory called Hashing. In Hashing directory there is another directory called modulus which contains modulus.go file. In package declaration of modulus.go, i have declared “package modulus” and similarly in main.go file i have declared “package main”. Whenever i try to run main.go, it runs fine but modulus.go gives error after running as “multiple packages in go-lang”.
I tried searching abt the issue online but no luck.
So you have a directory that looks like this:
hashing/main.go (File starts with
hashing/modulus/modulus.go (File starts with
Then while you are in
hashing/ you do
go build. This will create a binary called
hashing which you can execute with
Is the above correct?
Which operating system are you using by the way?
I do not understand what do you mean by
modulus.go running. If
modulus.go starts with
package modulus then it cannot run because it is a package. Packages get used by other code that can run (like main). So in your
main.go somewhere you would have a function call like
modulus.FunctionName() so that main can use your modulus package.
Notice that you cannot have 2 different packages in the same folder.
Thanks nesigma, i ran go build in hashing folder and removed “package modulus” line and added “package main” in hashing/modulus.go file also. The reason it was giving error was modulus.go and main.go both were having main() function.
Only i am little bit of confused about, why package main is to be declared when i am using func main().?
@Tanmay_Shirsath, Package name is the package’s default name for imports. (All files in a package must use the same name.) Here is the link that can help you to start with Golang: https://golang.org/doc/code.html#Command
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