Dart String length
Syntax & Examples

Syntax of String.length

The syntax of String.length property is:

 int length

This length property of String returns the length of the string.

Return Type

String.length returns value of type int.


✐ Examples

1 Calculate length of 'Hello, world!'

In this example,

  1. We create a string str1 with the value 'Hello, world!'.
  2. We then access the length property of str1 to get its length.
  3. The length of str1 is printed to standard output.

Dart Program

void main() {
  String str1 = 'Hello, world!';
  int length1 = str1.length;
  print('Length of str1: $length1');
}

Output

Length of str1: 13

2 Calculate length of 'ABCDEF'

In this example,

  1. We create a string str2 with the value 'ABCDEF'.
  2. We then access the length property of str2 to get its length.
  3. The length of str2 is printed to standard output.

Dart Program

void main() {
  String str2 = 'ABCDEF';
  int length2 = str2.length;
  print('Length of str2: $length2');
}

Output

Length of str2: 6

3 Calculate length of 'Lorem ipsum dolor sit amet'

In this example,

  1. We create a string str3 with the value 'Lorem ipsum dolor sit amet'.
  2. We then access the length property of str3 to get its length.
  3. The length of str3 is printed to standard output.

Dart Program

void main() {
  String str3 = 'Lorem ipsum dolor sit amet';
  int length3 = str3.length;
  print('Length of str3: $length3');
}

Output

Length of str3: 27

Summary

In this Dart tutorial, we learned about length property of String: the syntax and few working examples with output and detailed explanation for each example.