### Null check operator `??`

```
String name = person.name ?? "Adam"
```

### Optional `?.`
```
pages[0]?.contributors[0]?.authorDetails?.basicInfo?.firstName ??
```

### Assign if null `??=`

```
String name ??= "arpit"
```

### Cascade

Create an object and set its variables and return the main object that was created

```
Point p = Point()
          ..x = 4
          ..y = 5;
```