@lizardsquid no null... what...
how do you say undefined, then?
how do you say return "I didn't find the number you wanted"?

@Efi there's an option type!

it's either
Some(value)
or
None

so if your function needs to sometimes return nothing, you have to wrap it up in an option.

The point of this: you never get null pointer errors. Ever. Because the language knows if you forgot to check.

@lizardsquid there's another way to not get null pointer errors: don't use pointers in user code

@Efi sorry I didn't mean strictly pointers

you get the same problem in languages with null (or nil) but no pointers.