Learning JavaScript, Day 3 – Variables and Data Types

I had to get up ridiculously early (shut up I'm unemployed 7am is ridiculous) for an appointment, so I'm tired, I'm cold (the weather app is lying to me, it is not 10°C/50°F, it is cold), but I'm just awake enough to curl up in my blanket, put on a Frutiger Aero playlist (after a brief moment for Kristopher Carter's "Delenn Love Theme" because apparently I also want to spend a bit of time being sad), and take on more JavaScript hell yeah. JavaScript VariablesOh so this tells me that var is an older way to declare a variable. Good to know. I do like the idea of using let, so I'll stick with that. And then it gets into naming standards, which I get, reminds me not to give variables the same names as reserved keywords, sure, but then... A convention among professional programmers is to start a name with underscore for "private" variables. Private variables? Do I even want to know? I also really like how they have a detailed list on what to use when. Always declare variables Always use…