What Is Yul?

Yul is an intermediate language that compiles to Ethereum Virtual Machine (EVM) bytecode. It is designed to be a low-level language that gives developers a high degree of control over the execution of their smart contracts. It is similar in many ways to Assembly but with higher-level features that make it easier to work with [2].

Yul was previously called Julia or Iulia.

Within the context of smart contract development, Yul is usually referred to as Inline Assembly, as it is very similar to Assembly and is written within functions in smart contract code.