hello world project

1-hello-world/readme.md

@@ -0,0 +1,21 @@
+# Hello World
+Steps to reproduce
+```bash
+mkdir 1-hello-world
+cd 1-hello-world
+go mod init example/user/hello
+cat go.mod
+# first statement in a Go source file must be package name. Executable commands must always use package main. 
+
+# to run
+go run hello.go
+
+# to build and run binary
+go build
+./hello
+
+# to install binary to system
+go install example/user/hello
+# or
+go install
+```