How to remove text character values from string on flutter

Question

I would like to retrieve only the number values from a string on flutter without keeping the text hardcoded using replaceAll, the text can be anything but the number part of it has to be retrieved from it.

e.g.

String text = "Hello your number is: 1234";
String numberProvided = '1234';  // needs to be extracted from String text

print("The number provided is :" + numberProvided);

Like I said, the text characters shouldn't be hardcoded into the application, let me know if it is possible, thanks!

@RavindraS.Patil yes i want to retrieve only the number values from a string that includes both text and numbers — Hammadh
– Hammadh, Commented Dec 7, 2021 at 12:15

Kuntec · Accepted Answer · 2021-12-07 12:15:37Z

6

Use the simple regular expression

    print(text.replaceAll(RegExp("[a-zA-Z:\s]"), ""));

answered Dec 7, 2021 at 12:15

Kuntec

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1 Comment

Hardik Mehta Over a year ago

Add trim at the end to avoid unnecessary spaces lile this : print( text.replaceAll(RegExp("[a-zA-Z:\s]"), "").trim());

Ravindra S. Patil · Accepted Answer · 2021-12-07 12:17:55Z

1

Try below code hope its help to you. refer replaceAll method here

void main() {
  String text = "Hello your number is: 1234567890";
  var aString = text.replaceAll(RegExp(r'[^0-9]'), '');
  var aInteger = int.parse(aString);
  print(
    "The number provided is :" + aInteger.toString(),
  );
}

Your Output:

The number provided is :1234567890

answered Dec 7, 2021 at 12:17

Ravindra S. Patil

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