Dart String trimLeft()
Syntax & Examples

Syntax of String.trimLeft()

The syntax of String.trimLeft() method is:

 String trimLeft()

This trimLeft() method of String returns the string without any leading whitespace.

Return Type

String.trimLeft() returns value of type String.


✐ Examples

1 Trim leading whitespace from a string

In this example,

  1. We create a string str with leading whitespace ' Hello, World!'.
  2. We then use the trimLeft() method to remove any leading whitespace from the string.
  3. The trimmed string is stored in trimmedStr.
  4. We print both the original and trimmed strings to standard output.

Dart Program

void main() {
  String str = '   Hello, World!';
  String trimmedStr = str.trimLeft();
  print('Original String: $str');
  print('Trimmed String: $trimmedStr');
}

Output

Original String:    Hello, World!
Trimmed String: Hello, World!

2 Trim leading whitespace from another string

In this example,

  1. We create a string str with leading whitespace ' ABCDEF'.
  2. We then use the trimLeft() method to remove any leading whitespace from the string.
  3. The trimmed string is stored in trimmedStr.
  4. We print both the original and trimmed strings to standard output.

Dart Program

void main() {
  String str = '   ABCDEF';
  String trimmedStr = str.trimLeft();
  print('Original String: $str');
  print('Trimmed String: $trimmedStr');
}

Output

Original String:    ABCDEF
Trimmed String: ABCDEF

3 Trim leading whitespace from a sentence

In this example,

  1. We create a string str with leading whitespace ' Lorem ipsum dolor sit amet'.
  2. We then use the trimLeft() method to remove any leading whitespace from the string.
  3. The trimmed string is stored in trimmedStr.
  4. We print both the original and trimmed strings to standard output.

Dart Program

void main() {
  String str = '   Lorem ipsum dolor sit amet';
  String trimmedStr = str.trimLeft();
  print('Original String: $str');
  print('Trimmed String: $trimmedStr');
}

Output

Original String:    Lorem ipsum dolor sit amet
Trimmed String: Lorem ipsum dolor sit amet

Summary

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