l bob = getBobBalance()
// Bob

sum(
  eda,
  bob
)
// The sum is 155
```
]


---
# Parameters evaluation

.seventy-two-left[
```scala mdoc:reset
def getOrElse[A](option: Option[A], fallback: A): A =
  option match {
    case Some(value) => value
    case None        => fallback
  }
```
]
--

.seventy-two-left[
```scala
getOrElse(Some("bob@gmail.com"), "support@fp-tower.com")
// res: String = "bob@gmail.com"

getOrElse(None                 , "support@fp-tower.com")
// res: String = "support@fp-tower.com"
``