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In this article, we will be Explore Dart String Interpolation. We will learn how to execute a demo program. We will show you many demo for understanding string interpolations in your Dart applications.

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Table Of Contents:

Introduction

Dart String Interpolation Demo 1

Demo 2 – Embedding Expressing Dart String Interpolation

Demo 3 – Multi-Line Strings

Demo 4 – Method & Properties access into String

Conclusion

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Introduction:

It is possible to incorporate variable values into string literals in Dart. Here, the String Interpolation feature in Dart offers a more lucid method of displaying text in Dart, allowing us to do away with the laborious string concatenation method that we previously employed (where we use the + Operator to concatenate text).

We can encapsulate a variable value or expression inside a string in Dart by utilising String Interpolation. Syntax looks like this: $variableName or ${expression}.

Dart String Interpolation Demo 1:

Here are some examples that will help you better grasp string interpolations.

void main() {
  String name = 'Sam';
  int age = 28;

  String greeting = 'Hello, $name! You are $age years old.';
  print(greeting); // Output: Hello, Sam! You are 28 years old.
}

Name and age are two variables with values that are inserted into a string greeting using the $name & $age syntax, as you can see in the source code above.

Demo 2 – Embedding Expressing Dart String Interpolation:

You must use ${}, or curly braces, when doing any calculations or when employing expressions.

void main() {
  int a = 3;
  int b = 2;

  String result = 'The sum of $a and $b is ${a + b}.';
  print(result); // Output: The sum of 3 and 2 is 5.
}

In this case, the final string result is embedded within the string after a + b is done.

Demo 3 – Multi-Line Strings:

void main() {
  String firstName = 'Sam';
  String lastName = 'Thomas';

  String introduction = '''
  My name is $firstName $lastName.
  I am expert in Dart.
  ''';

  print(introduction);
  // Output:
  // My name is John Doe.
  // I am expert in Dart.
}

We may construct a multiline string in Dart and interpolate the variable into it by utilising triple quotes.

Demo 4 – Method & Properties access into String:

We may also integrate method and property access in Dart by using the string interpolation technique, as seen in the example below.

void main() {
  DateTime currentDate= DateTime.now();

  String currentTime = 'Current time is: ${currentDate.hour}:${currentDate.minute}:${currentDate.second}';
  print(currentTime);
  // Output: Current time is: HH:MM:SS (actual time values)
}

Here, DateTime is being used to obtain the current DateTime. Using the syntax ${currentDate.hours}, ${currentDate.minute}, and ${currentDate.second}, we can readily access the attributes of the now() Class Object, which include hours, minutes, and seconds, into strings.

Conclusion:

In the article, I have explained how the Explore Dart String Interpolation; you can modify this code according to your choice. This was a small introduction to Explore Dart String Interpolation User Interaction from my side, and it’s working using Flutter.

I hope this blog will provide you with sufficient information on trying the Explore Dart String Interpolation in your Flutter projects. The best method for retrieving values from dynamic strings in Dart is String Interpolation. This makes your code much easier to read and maintain. String interpolation is a crucial method in Flutter Dart programming, regardless of whether you are working with basic string concatenation or intricate data representation. So please try it.

❤ ❤ Thanks for reading this article ❤❤

If I need to correct something? Let me know in the comments. I would love to improve.

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