How to find integer numbers length in Dart?| Flutter By Example

This tutorial shows you how to find integer number lengths in Dart.

For example, if the given number is 12345, Then the length of a number is 5.

How to find the length of a number string in Dart?

There are many ways to find the length of an integer in a dart

The below program explains about The first way, Convert the integer to a string using the toString() method Call length property to return the length of a string.

The second way, convert a number to a String using interpolation syntax. Call length property

void main() {
  int num = 123456;

  print(num.toString().length); // 6
  print('$num'.length); // 6
  print(1231456.length()); // 7
}

extension NumberLength on num {
  int length() => this.toString().length;
}

Another way is to write an Extension on num type

Added the length method that returns the string length.

void main() {
  print(1231456.length()); // 7
}

extension NumberLength on num {
  int length() => this.toString().length;
}

Conclusion

Learn how to get the size of an integer in dart with examples.