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Flutter – Create 6 Distinctive Random Numbers

Create 6 Distinctive Random Numbers using Flutter and Dart to make an app. Where these 6 different numbers don’t repeat themselves when they are randomize

Although I used this

import 'dart:math';

void main() {
  List<int> values = [];

  while (values.length < 6) {
    int randomValue = Random().nextInt(50);

    if (!values.contains(randomValue)) {
      values.add(randomValue);
    }
  }

  print('Randomized values: $values');
}

But I can’t use display it on the text widget in my app

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2

Answers


  1. 0

    You can use Set instead of List.

    void main() {
  Set<int> values = {};

  while (values.length < 6) {
    int randomValue = Random().nextInt(50);

    if (!values.contains(randomValue)) {
      values.add(randomValue);
    }
  }

  print('Randomized values: $values');
}

    This can take quite a time based on random generation.

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  2. 0

    your code looks like pure Dart code.

    And your code is just fine to generate the 6 random numbers and put it into an array.

    If you have Flutter code around, you can just quickly do print the array in a Text() widget doing this:

    Text(values.toString())

    An entire class in Flutter using your same code could be:

    import 'dart:math';
import 'package:flutter/material.dart';

class YourClass extends StatelessWidget {
  const YourClass({super.key});

  @override
  Widget build(BuildContext context) {
    List<int> values = [];
    while (values.length < 6) {
      int randomValue = Random().nextInt(50);
      if (!values.contains(randomValue)) {
        values.add(randomValue);
      }
    }
    print('Randomized values: $values');

    return SafeArea(
      child: Scaffold(
          body: Text(values.toString())
      ),
    );
  }
}
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