Dart Set forEach()
Syntax & Examples

Set.forEach() method

The `forEach` method in Dart applies the provided function to each element of the set in iteration order.

Syntax of Set.forEach()

The syntax of Set.forEach() method is:

 void forEach(void f(E element))

This forEach() method of Set applies the function f to each element of this collection in iteration order.

Parameters

ParameterOptional/RequiredDescription
frequiredThe function to apply to each element of the set.

Return Type

Set.forEach() returns value of type void.


✐ Examples

1 Iterate over integers in the set

In this example,

  1. We create a Set set containing integers.
  2. We use the forEach() method with a function that prints each element to standard output.
  3. The elements are printed in the order they appear in the set.

Dart Program

void main() {
  Set<int> set = {1, 2, 3, 4, 5};
  set.forEach((element) => print('Element: $element'));
}

Output

Element: 1
Element: 2
Element: 3
Element: 4
Element: 5

2 Iterate over strings in the set

In this example,

  1. We create a Set set containing strings.
  2. We use the forEach() method with a function that prints the length of each string to standard output.
  3. The lengths of the strings are printed in the order they appear in the set.

Dart Program

void main() {
  Set<String> set = {'apple', 'banana', 'orange'};
  set.forEach((element) => print('Length of $element: ${element.length}'));
}

Output

Length of apple: 5
Length of banana: 6
Length of orange: 6

Summary

In this Dart tutorial, we learned about forEach() method of Set: the syntax and few working examples with output and detailed explanation for each example.