Indexes in Dart

Every element in the List, or String, has a unique address. Such addresses are called indexes:

Indexes start from 0. The first element is assigned the index 0, the second element is assigned the index 1, and so on.

We can retrieve an element from the list using its index with the following syntax:

javascript
listName[index]

Example

Let's print the element at index 1 from the List:

main

void main() {

List<String> names = ["Bob", "John"];

print(names[1]); // John

}


              1234
            
void main() {
  List<String> names = ["Bob", "John"];
  print(names[1]); // John 
}

Editing

Dart allows modifying the value of an item in a List. In other words, you can re-write the value of a List item.

main

void main() {

List cars = ["BMW", "Porsche", "Ford"];

cars[0] = "Toyota";

print(cars); // ["Toyota", "Porsche", "Ford"]

}


              12345
            
void main() {
  List cars = ["BMW", "Porsche", "Ford"];
  cars[0] = "Toyota";
  print(cars); // ["Toyota", "Porsche", "Ford"]
}

The above example updates the value of the List item with index 0. The output of the code will be − ["Toyota", "Porsche", "Ford"].

String Indexes

In a String, we also have indexes.

main

void main() {

String user = "Alex";

print(user[0]);

}


              1234
            
void main() {
  String  user = "Alex";
  print(user[0]);
}

1. Select the element at index 1 in the string 'Codefinity'.

2. What will the following code output?

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