bustedGoTutorial.md

Follow these instructions to write a Go program.

Create a directory to work in:

workDir=$(mktemp -d --tmpdir mdrip_example_XXXXX)
pushd $workDir

Make a file with an add function:

cat - <<EOF >add.go
package main

func add(x, y int) (int) { return x + y }
EOF

Write a main program to call it:

cat - <<EOF >main.go
package main

import "fmt"

func main() {
  comment this line to avoid compiler error
  fmt.Printf("Calling add on 1 and 2 yields %d.\n", add(1, 2))
}
EOF

go mod init myAdder
go mod tidy
echo Dependencies defined.
badecho Enter go build

go build .

Now you can run main:

./myAdder

Copy/paste the above into a shell to build and run your program.

Clean up with this command:

popd
/bin/rm -rf ${workDir}

greeting="Hello world!"