How to create a List of size N in Dart

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How to create a List of size N in Dart ?

Answer

To create a list of size N in Dart, you can use the List.filled constructor or the List.generate constructor.

✐ Examples

1 Create a List of Size N with Default Values Using List.filled

In this example,

We use the List.filled constructor to create a list of size N with each element initialized to a default value.
The List.filled constructor takes two arguments: the size of the list and the default value for each element.
Finally, we print the created list to standard output.

Dart Program

void main() {
    int size = 5;
    int defaultValue = 0;
    List<int> list = List.filled(size, defaultValue);
    print('List of size \$size with default values: \$list');
}

Output

List of size 5 with default values: [0, 0, 0, 0, 0]

2 Create a List of Size N with Specific Values Using List.generate

In this example,

We use the List.generate constructor to create a list of size N with each element initialized to a specific value.
The List.generate constructor takes two arguments: the size of the list and a function that returns the value for each element.
Finally, we print the created list to standard output.

Dart Program

void main() {
    int size = 5;
    int specificValue = 1;
    List<int> list = List.generate(size, (index) => specificValue);
    print('List of size \$size with specific values: \$list');
}

Output

List of size 5 with specific values: [1, 1, 1, 1, 1]

Summary

In this tutorial, we learned How to create a List of size N in Dart language with well detailed examples.

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How to create a List of size N in Dart

How to create a List of size N in Dart ?

Answer

✐ Examples

1 Create a List of Size N with Default Values Using List.filled

Dart Program

Output

2 Create a List of Size N with Specific Values Using List.generate

Dart Program

Output

Summary

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