Expressions in AL are made up of four elements—constants, variables, operators, and procedures. We could include a fifth element, expressions, because an expression may include a subordinate expression within it. As we become more experienced in coding AL, we will find that the capability of nesting expressions can be both a blessing and a curse, depending on the specific use and readability of the result.
We can create complex statements that will conditionally perform important control actions and operate in much the same way that a person would think about a task. We can also create complex statements that are very difficult for a person to understand. These are tough to debug and sometimes almost impossible to deal with in a modification.
One of our responsibilities is to be able to tell the difference so that we can write code that makes sense in operation, but is also easy to read and understand.
According to the Business Central Docs, an AL expression (https...