How to Check if String contains only Alphabets and Numbers in Dart - Step by Step Examples

How to Check if String contains only Alphabets and Numbers in Dart ?

Answer

To check if a string contains only alphabets and numbers in Dart, you can use regular expressions from the Dart RegExp class.

✐ Examples

1 Check if String contains only Alphabets and Numbers using regular expression

In this example,

We create a regular expression pattern that matches alphabets and numbers only using the RegExp class.
We use the hasMatch method of the regular expression to check if the string matches the pattern.
If the string contains only alphabets and numbers, containsOnlyAlphabetsAndNumbers will be true, otherwise false.
Finally, we print the result.

Dart Program

void main() {
  String str = "Hello123";
  RegExp pattern = RegExp("^[a-zA-Z0-9]+\$");
  bool containsOnlyAlphabetsAndNumbers = pattern.hasMatch(str);
  print("String contains only alphabets and numbers: \$containsOnlyAlphabetsAndNumbers");
}

Output

String contains only alphabets and numbers: true

Summary

In this tutorial, we learned How to Check if String contains only Alphabets and Numbers in Dart language with well detailed examples.

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