How to print Pascal's Triangle Pattern in Dart

How to print Pascal's Triangle Pattern in Dart ?

Answer

To print Pascal's Triangle Pattern in Dart, you can use nested loops where the outer loop controls the rows and the inner loop calculates the values for each row based on the binomial coefficient formula.

✐ Examples

1 Pascal's Triangle Pattern

In this example,

We use a variable n to represent the number of rows in Pascal's triangle.
We initialize a 2D list pascal to store the triangle values.
We use nested loops to calculate and store the values using the binomial coefficient formula.
We print the triangle values using a formatted output.

Dart Program

void printPascalsTriangle(int n) {
  List<List<int>> pascal = List.generate(n, (i) => List.filled(i + 1, 0));
  for (int i = 0; i < n; i++) {
    for (int j = 0; j <= i; j++) {
      if (j == 0 || j == i) {
        pascal[i][j] = 1;
      } else {
        pascal[i][j] = pascal[i - 1][j - 1] + pascal[i - 1][j];
      }
      stdout.write('${pascal[i][j]} ');
    }
    stdout.writeln();
  }
}

void main() {
  int rows = 5;
  printPascalsTriangle(rows);
}

Output

Summary

In this tutorial, we learned How to print Pascal's Triangle Pattern in Dart language with well detailed examples.

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