for comprehension

for + block + yield + overall result

where each line in the block consists of
result ← effect
and each line’s result is the success value of that line’s effect

Z, p 33

functional effect

a blueprint for a concurrent workflow

Z, p 27

functional effect type

the core data type in ZIO library - ZIO[R, E, A]
R is the environment type
E is the error type
A is the success type

Z, p 28