В отпуске я хочу больше гулять и меньше работать.

On vacation, I want to walk more and work less.

Breakdown of В отпуске я хочу больше гулять и меньше работать.

• я: I
• и: and
• гулять: to walk
• хотеть: to want

Questions & Answers about В отпуске я хочу больше гулять и меньше работать.

Why is it в отпуске and not в отпуск?

Because here в отпуске means on vacation / while on vacation, describing a state or location.

With в, Russian often uses:

• Accusative for movement into something:
  
  • в отпуск = on vacation in the sense of go on vacation
• Prepositional for being in that state/place:
  
  • в отпуске = on vacation, already there

Compare:

• Я еду в отпуск. = I’m going on vacation.
• Я в отпуске. = I’m on vacation.

So in your sentence, the speaker is already talking about what they want to do during the vacation, so в отпуске is correct.

What case is отпуске, and why does it have the ending -е?