Valid name

[STG2020]

Hi. What's wrong with answer C?

Which library name (libref) is valid?

a.  2010Car

b.  car/2010

c.  car2010

d.  cars_2010

Your answer: d
Correct answer: c

This libref follows all three rules for valid librefs. A libref must have a length of one to eight characters, and must begin with a letter or underscore. The remaining characters must be letters, numbers, or underscores.

[vellad · Accepted solution]

The question asks which of the 4 is valid. Only (c.) is valid.

(a.) Invalid because first character is numeric.

(b.) Invalid because one of the characters is '/'.

(d.) Invalid because length > 8.