Saved! You can share or revisit your program with this link:

Toolbar controls:

• Run: Compile and execute your program. It must have a main function for this to work.
• Core: Show GHC's intermediate representation for your module. To avoid having to define main, put e.g. module M where before the first import.
• Asm: Show compiled x86_64 assembly.

Drop-down menus:

• GHC version selection.
• Optimisation flags: a higher number means more optimisations. -O2 is rarely helpful.

Tips and tricks:

• Ctrl+Enter re-runs your code using the most recent configuration.
• For keyboard shortcuts in the editor (Ace), see this list. Some highlights:
  • Ctrl+/: Comment-out a line of code.
  • Ctrl+,: Open a settings panel.