How do you write the number 7?

[Lachi]

Line (normal)

[Bojack Horseman]

Exactly just like this: 7

[President of the great nation of 🏳️‍⚧️]

No line (sane, normal, FF)

[Associate Justice PiT]

     I use the line, so it is less easily confused with 1. I also write z with a line for a similar reason.

[LLR]

Line (literally sane and normal)

[Grumpier Than Thou]

They interchange, but lately i've used the line most of the time.

[SWE]

No line (not a fascist)

[100% pro-life no matter what]

People actually write it with a line??

[Antonio the Sixth]

Line (literally sane and normal)

[RFayette]

People actually write it with a line??

I have occasionally, though I almost always write z's with a line, which is essential when writing proofs for my matrix theory class, lest I mix them up with a 2.  

[angus]

Line (normal)

I know a few students who do that.  They do it with the letter Z as well.  I think they must have picked it up somewhere but I don't give them a hard time over it.

I write my 7 like I write my Z, just like this:  7 and Z.  Like a gringo, not like a nazi.

I also write the number 2 like this:  2.

But I write the number 9 like a backward P.

[Since I'm the mad scientist proclaimed by myself]

No line (sane, normal, FF)

[Santander]

With a line, of course.

[100% pro-life no matter what]

What about the number 2 (loop or no loop)?  What about 8 (one continuous line or two circles)?

[100% pro-life no matter what]

What about the number 2 (loop or no loop)?  What about 8 (one continuous line or two circles)?  The number 4 (computer 4 or the one without a triangle)?

[Crumpets]

Line. I also write Z with a line.

[OSR stands with Israel]

Exactly just like this: 7

[Antonio the Sixth]

What about the number 2 (loop or no loop)?  What about 8 (one continuous line or two circles)?  The number 4 (computer 4 or the one without a triangle)?

- No loop
- Continuous line
- Computer

[Lachi]

Line. I also write Z with a line.

[President of the great nation of 🏳️‍⚧️]

What about the number 2 (loop or no loop)?  What about 8 (one continuous line or two circles)?  The number 4 (computer 4 or the one without a triangle)?

- No loop
- Continuous line
- Computer

[Lachi]

This is how I write the numbers 0-9

[World politics is up Schmitt creek]

7, Z, and upper-case J with lines; 0 with no line but narrower than O
2 with loop
8 in one continuous stroke
Open-topped 4

[Goldwater]

No line (sane, normal, FF)

What about the number 2 (loop or no loop)?  What about 8 (one continuous line or two circles)?  The number 4 (computer 4 or the one without a triangle)?

- No loop
- Continuous line
- Computer

[Mr. Smith]

Hell yes with the line for the lucky number and "Z". Anything else is so uncouth.

Open topped "4"

"0" is often just "O"

"8" is one continuous line that appears to be two triangles.

No squiggle for "2"

Backwards uppercase "E" for 3

[kcguy]

Generally without a line.  (American)

If I'm writing something alphanumeric, such as my car's VIN number, I'll lightly add the horizontal line to the 7, a vertical line to the 0, etc., to distinguish it from any similar letters.