When I first use a word and explain its use, I boldface it.
Two positive integers are relatively prime when their greatest common factor is 1. 3 and 7 are relative prime. 12 and 15 are not.
All code and bits of code will appear in code font, which is monospaced and shaded. Like this:
for prime in [2, 3, 5, 7, 11, 13]:
print(prime, " is a prime.")
I'll also typically use code font for bits of code and the output of code. Like this:
In the code snippet above, prime is the loop variable and the list from which its values are taken is [2, 3, 5, 7, 11, 13]. The output is:
2 is a prime.
3 is a prime.
5 is a prime.
7 is a prime.
11 is a prime.
13 is a prime.
I'll assume that your console will use the standard console prompt. Like this:
>>>