Understanding and application

In لَا إِيمَانَ, the noun ends in one fatḥah without tanwīn. Which لَا is used?

Negating Evil and the Grammatical Rules of lā (Hadith 70-78)

• lā of broad category-negation
• prohibitive lā before a verb
• lā as a vocative particle
• lā as a coordinating particle