Learn French: Je n'ai pas de monnaie pour le restaurant. - I don't have any change for the restaurant.

Normally, to say "some change", you would use the feminine article for an uncountable thing: de la monnaie. But in a negative sentence where the quantity drops to absolutely zero, articles like un, une, des, and de la all change to just de. So, pas de monnaie specifically means "not any change".

Wait, doesn't monnaie mean "money"?

It looks like it, but monnaie usually means "change" (coins or small bills) or "currency". If you want to say "money" in general, you use the word argent. Here, the speaker specifically lacks the loose change needed for the restaurant.

Why is it written as n'ai rather than ne ai?

The standard French negation wraps around the verb using ne ... pas. However, because ai (meaning "have") starts with a vowel, the e on ne is dropped and replaced with an apostrophe. This makes the words flow together more smoothly when spoken.

Why do we need le in pour le restaurant?