Is it allowed to put external links into a code?

Question

Sorry, if this answer will be obvious and this question was posted (I didn't find any)

Answer 1

https://www.sololearn.com/terms-of-use/

^Read through that for specifics. Overall, you're allowed to link out, but within reason and not to anything that violates the terms of use.

Answer 2

Ivan Petriv yes
Jakko Jak answered the question correctly.