LaTeX How to determine leaving space after \

[mech-eng]

Would you explain when the space should be left when backslash, \, is used?

For example some codes using backslash.
\ \displaystyle a=\frac{dv}{dt} \ : This one works good because there is space between the first two backslashes.

But if the space between the first backslash is removed the code does not work
$\\displaystyle a= \frac{dv}{dt} \$

And there should be a space between the last backslash and the last numbersign pair, ##.
Would you please explan this?

Thank you.

 

[DrClaude]

\ is what is known as an escape character. In the example where it doesn't work, you have \\, which corresponds to a newline, and \# which produces #, so that the closing ## is not present.

 

[mech-eng]

$\ \displaystyle a=\frac{dv}{dt} \$

$\\displaystyle a= \frac{dv}{dt} \$

Here that square does not appear.

Thank you.

 

[DrClaude]

Here that square does not appear.

Because you left a space between \ and #.

 

[mech-eng]

\ is what is known as an escape character. In the example where it doesn't work, you have \\, which corresponds to a newline, and \# which produces #, so that the closing ## is not present.

Sorry for my being amateur, but to understand this answer will take some time for me and the questions might cause some new ones. This means you might get tired.

What if double \\ corresponds to a new line? I do not know this case. You might give me a link explaning this basic programming step, \\, so that I could learn by reading.

P.S: I cannot access wikipedia because of some political reasons but I migth try google cache.Thank you.

 

[mech-eng]

Some links for related question.
https://tex.stackexchange.com/questions/225893/what-does-double-backslash-in-latex-mean

https://tr.sharelatex.com/learn/Line_breaks_and_blank_spaces

https://stackoverflow.com/questions...e-backslash-with-a-single-backslash-in-python

http://web.mit.edu/rsi/www/pdfs/ifaq.pdf

 

[DrClaude]

What if double \\ corresponds to a new line? I do not know this case. You might give me a link explaning this basic programming step, \\, so that I could learn by reading.

You seem to have found some links on your own. But this is language specific, so let's stick to LaTeX. One a \ appears in LaTeX, what happens depends on what immediately follows it.

P.S: I cannot access wikipedia because of some political reasons but I migth try google cache.

Just Google "escape character".