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Flow Control and Errors

Brian Ketelsen
me@brianketelsen.com
@bketelsen

* Flow Control and Errors

Go's control flow is very similar to C, but it has a few simplifications.

Go's if statements don't require parenthesis. They're easier to read, but you can add the parens if you want them for clarity in more complex statements.

- If Examples

	cd $GOPATH/src/github.com/gophertrain/material/flowanderrors/demos/if/
	go run main.go


* If Statements

It's idiomatic in go to skip the else where possible:

- Skipping Else

	cd $GOPATH/src/github.com/gophertrain/material/flowanderrors/demos/skipelse/
	go run main.go

* For

There's a Go joke that goes like this:

How do you spell "WHILE" in go? F O R

There is one looping construct, the "for" statement.

- For

	cd $GOPATH/src/github.com/gophertrain/material/flowanderrors/demos/for/
	go run main.go


* SWITCH

Go's switch statement is very powerful. Cases are evaluated top to bottom until the first match is found.

- Switch

	cd $GOPATH/src/github.com/gophertrain/material/flowanderrors/demos/switch/
	go run main.go

* Type Switching

One of the more common uses of the switch statement is when determining the type of an interface{} value.

- Type Switch

	cd $GOPATH/src/github.com/gophertrain/material/flowanderrors/demos/typeswitch/
	go run main.go