Gain insights into Dart, an object-oriented language crucial for Flutter development. Delve into its fundamentals and prepare to craft high-quality native interfaces on iOS and Android.

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Learn Dart for free with this interactive course. Dart is a clean, simple, class-based, object-oriented language with more structure than JavaScript, the programming language it's heavily based on. However, you can't have a conversation about Dart without mentioning Flutter. 

Flutter is Google's mobile UI framework for crafting high-quality native interfaces on iOS and Android. Flutter applications are written using the Dart programming language, which has helped make Dart a beloved language by the developer community. Before you can start fluttering out Flutter applications, you must learn Dart. This course will help you learn the fundamentals of Dart and start your journey to learning Flutter. Start learning today.

Learn Dart: First Step to Flutter

# String Concatenation

To concatenate two strings means to join them together. Concatenation of two or more strings is done using the `+` operator.



main() {
  String s1 = "First half of the string. ";
  String s2 = "Second half of the string";
  print(s1 + s2);
}

The code above is pretty simple. On **line 4** we are concatenating the first string, `s1`, and the second string, `s2`, and then printing the concatenated string. 

# String interpolation

**String interpolation** is the ability to create new strings or modify existing ones by embedding them with expressions. Expressions are evaluated, and the resulting values are converted into strings and concatenated with the enclosing string. Interpolation is Dart’s more concise and efficient alternative to string concatenation. However, string interpolation is a lot more complex than simple concatenation which allows a lot more flexibility.

## Syntax

An un-escaped `$` character in a string signifies the beginning of an interpolated expression. 

The `$` sign can be followed by a single *identifier id* that does not contain the `$` character. 


# String interpolation

**String interpolation** is the ability to create new strings or modify existing ones by embedding them with expressions. Expressions are evaluated, and the resulting values are converted into strings and concatenated with the enclosing string. Interpolation is Dart’s more concise and efficient alternative to string concatenation. However, string interpolation is a lot more complex than simple concatenation which allows a lot more flexibility.

## Syntax

An un-escaped `＄` character in a string signifies the beginning of an interpolated expression. 

The `＄` sign can be followed by a single *identifier id* that does not contain the `＄` character. 


Let’s learn how to concatenate strings using string interpolation.

Introduction

Getting Started with Dart

Data Types and Variables

Operators

Dart's Collection

Control Flow Statements

Exploring Functions

Classes

Where to Go From Here

String Interpolation

String Concatenation