What are best practices for spaces?

Question

As this is my first programming language, I'm trying to figure out if I need to develop consistent habits as far as spacing goes.
Overall, would it be best to use spaces between things like
x = 30
What about
puts 3.eql?(3.0)
Should I write puts 3.eql?(3.0) as
puts 3 .eql? (3.0)
in order to treat it consistently, as if it were a
3 == 3.0
the .eql? is a command in the same category as the == or = or + commands, correct?
Also, why is the 3.0 in parenthesis, the lesson didn't explain that I feel

Answer 1

In puts3.eql?(3.0) it is better to write without spaces however in 3==3.0 I would really reccomened doing 3 == 3.0 instead, it is better to look at that way. Variable declaration should always be x = 10 instead of x=10 for me

Answer 2

in any case when you work in a team, try and follow the style of the existing code

Answer 3

I'm agree with previous answer, but I want add that my habits are flexibles:
- adding and retrieving blank lines spacing to better see/read code parts I'm working on, and "collapsing" those already or not at this time focussing ( less scroll to navigate from one part to another )
- often not putting spaces in between right handed side expression in affectation ( and in function arguments ), because I find that more clear since there's more than one operation inside ( too much too big lines else):
var length = Math.sqrt(coord_x*coord_x+coord_y*coord_y);
... rather than:
var length = Math.sqrt( coord_x * coord_x + coord_y * coord_y);
By the same way, to optimize visually readabilty, I often add more space when posting code in posts, because not monospaced font collapse more characters to each others ( and empty square brackets will be less readable, for example: [ ] rather than [] )...