Dart String trim()
Syntax & Examples

Syntax of String.trim()

The syntax of String.trim() method is:

 String trim()

This trim() method of String returns the string without any leading and trailing whitespace.

Return Type

String.trim() returns value of type String.


✐ Examples

1 Trim leading and trailing whitespace

In this example,

  1. We create a string str1 with leading and trailing whitespace.
  2. We use the trim() method on str1 to remove the leading and trailing whitespace.
  3. We print the trimmed string to standard output.

Dart Program

void main() {
  String str1 = '   Dart   ';
  String trimmed1 = str1.trim();
  print('Trimmed string 1: $trimmed1');
}

Output

Trimmed string 1: Dart

2 Trim leading and trailing whitespace

In this example,

  1. We create a string str2 with leading and trailing whitespace.
  2. We use the trim() method on str2 to remove the leading and trailing whitespace.
  3. We print the trimmed string to standard output.

Dart Program

void main() {
  String str2 = '  Dart  ';
  String trimmed2 = str2.trim();
  print('Trimmed string 2: $trimmed2');
}

Output

Trimmed string 2: Dart

3 Trim leading whitespace

In this example,

  1. We create a string str3 with leading whitespace.
  2. We use the trim() method on str3 to remove the leading whitespace.
  3. We print the trimmed string to standard output.

Dart Program

void main() {
  String str3 = ' Dart';
  String trimmed3 = str3.trim();
  print('Trimmed string 3: $trimmed3');
}

Output

Trimmed string 3: Dart

Summary

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