Hello Nothing¶
Attempting to download an empty file to the LameStation will generate an error from PropellerIDE.
So here we see the bare minimum that constitutes a Spin program.
PUB First
Well, that was easy!
This is called a PUB block, which is short for public function. Functions are areas where you write code that can do stuff. If your code is a sentence, then a function is the verb, the action. You can put as many PUB blocks as you want into a file, but when you run your code, the Propeller will start by running the first public function that appears in the file. From that function, you can call other functions.
PUB First
Third
PUB Another
PUB Third
Another
All Spin programs must include at least one PUB block.
Note
Spin is not case-sensitive.
PUB First
is the same as
pub first
Remember that!
View the complete example at /tutorials/Basics/HelloNothing.spin.
Bonus Round: Function Names!¶
Function names can contain letters, numbers, and underscores. However, the first character cannot be a number (that's good; otherwise, they'd start looking like passwords).
Good:
hello_chickenbacon123_supertime
Bad:
123attackextreme#@$**