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What is this go language? Let’s explore.

Go language uses lots of standard libraries, list of which can be found at https://golang.org/pkg/

Importing functions from other packages

• 
  Visit pkg.go.dev and search for a “quote” package.
  Locate and click the rsc.io/quote package in search results (if you see rsc.io/quote/v3, ignore it for now).
• run command “go mod init hello” to generated mod files.
• finally run “go run <filename>.go”

Packages

• group of files in a directory form package
• functions and variables are accessible across package files.
• Function and var that start with capital letter are called exported variables that can be accessed from functions of other files in the package.