et
def greeting(): Unit =
  println("Hello")
```
]

<br><br><br><br>

.forty-seven-left[
```scala
greeting()
// Hello
```
]

---
# 2. Defs are reevaluated everytime

.forty-seven-left[
```scala mdoc:reset
def greeting(): Unit =
  println("Hello")
```
]

<br><br><br><br>

.forty-seven-left[
```scala
greeting()
// Hello

greeting()
// Hello
```
]

---
# 2. Defs are reevaluated everytime

.forty-seven-left[
```scala mdoc:reset
import java.time.Instant

def nowMillis(): Long =
  Instant.now().toEpochMilli
```
]