How to find the length of a string in Dart:
In this post, we will learn how to find the length of a string in Dart. Dart provides one property length in the string class that returns the length of a string. I will show you examples of different strings and finding out the length of these.
Dart program to find the length of string:
The syntax of length is :
String.lengthIt is an integer value that returns the number of characters in that string. Let’s take a look at the example below:
void main() {
String string_1 = 'Hello';
String string_2 = 'Hello world';
String string_3 = '1234';
String string_4 = 'Hello';
String string_5 = '';
print(string_1.length);
print(string_2.length);
print(string_3.length);
print(string_4.length);
print(string_5.length);
}It will print the below output:
5
11
4
5
0Calling length on null:
If we call length on null, it throws one exception:
void main() {
String string_1 = null;
print(string_1.length);
}It will give one exception:
Unhandled exception:
NoSuchMethodError: The getter 'length' was called on null.
Receiver: null
Tried calling: length
#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)