<human>: Convert the following Java 8 switch statement to a Java 17 enhanced switch expression:

```java
// Java 8 code
int day = 3;
String dayName;
switch (day) {
  case 1: dayName = "Monday"; break;
  case 2: dayName = "Tuesday"; break;
  case 3: dayName = "Wednesday"; break;
  default: dayName = "Invalid day"; break;
}
```

<bot>: ```java
// Java 17 code using switch expression
int day = 3;
String dayName = switch (day) {
  case 1 -> "Monday";
  case 2 -> "Tuesday";
  case 3 -> "Wednesday";
  default -> "Invalid day";
};
```