List access

Learn to access list elements by index.

List access

You reach List elements by index. Indexing is zero-based: the first element is list[0], the second list[1], and so on. The index is written inside square brackets.

For example in var numbers = [10, 20, 30]; the value of numbers[0] is 10, numbers[1] is 20, numbers[2] is 30. The index must be less than the list length; otherwise an error is thrown.

Index bounds

When accessing a list the index must be less than the length. The list [10, 20, 30] has 3 elements; valid indices are 0, 1, 2. Writing numbers[3] or numbers[5] throws a runtime error (RangeError).

Negative indices are not supported. You can reach the last element with numbers[numbers.length - 1] or with Dart's numbers.last property. Practical tip: in a loop use indices from 0 to length - 1.

Exercise Print the second element

Declare a List with var numbers = [10, 20, 30];. Print the second element with print(numbers[1]);. The output on a single line must be 20.

Show example solution

var numbers = [10, 20, 30];
print(numbers[1]);

Test yourself

Get the first element

var numbers = [10, 20, 30];
print(numbers____);

Show answer

var numbers = [10, 20, 30];
print(numbers[0]);

What does numbers[1] give?
```
var numbers = [10, 20, 30];
print(numbers[1]);
```
- 20
- 30
- 10
- 1
Show answer

20 — Indexing is zero-based; numbers[1] is the second element, 20.
Match each part to its job

[0]

First element
[1]

Second element
length - 1

Last index
[i]

I-th element

Next lesson: add and remove

We Are Enhancing Your Experience

Cookie Preferences

Strictly Necessary Cookies

Analytical Cookies