How to Check if String is Empty in Dart - Step by Step Examples

How to Check if String is Empty in Dart ?

To check if a string is empty in Dart, you can use the isEmpty property of the String class.

In this example,

We declare a variable named str1 with an empty string value "".
We use the isEmpty property on str1 to check if it is empty.
The isEmpty property returns true if the string is empty, otherwise false.
Finally, we print the result to the console.

void main() {
  var str1 = "";
  var isEmpty = str1.isEmpty;
  print("Is string empty: $isEmpty");
}

Is string empty: true

In this example,

We declare a variable named str2 with a non-empty string value "Hello World".
We use the isEmpty property on str2 to check if it is empty.
The isEmpty property returns true if the string is empty, otherwise false.
Finally, we print the result to the console.

void main() {
  var str2 = "Hello World";
  var isEmpty = str2.isEmpty;
  print("Is string empty: $isEmpty");
}

Is string empty: false

In this tutorial, we learned How to Check if String is Empty in Dart language with well detailed examples.