stringOperations

In Dart, you can perform various string operations to manipulate and work with text data. Here are some common string operations in Dart:

1. Concatenation:

You can concatenate (combine) strings using the + operator or the += operator.

String firstName = "John";
String lastName = "Doe";

String fullName = firstName + " " + lastName; // Using +
print(fullName); // "John Doe"

String message = "Hello, ";
message += "World!"; // Using +=
print(message); // "Hello, World!"

2. Interpolation:

String interpolation allows you to embed expressions or variables within a string using ${}.

String name = "Alice";
int age = 30;

String greeting = "Hello, ${name}! You are ${age} years old.";
print(greeting); // "Hello, Alice! You are 30 years old."

3. String Length:

You can get the length of a string using the length property.

String text = "Dart is fun!";
int length = text.length;
print(length); // 13

4. Substring:

You can extract a portion of a string using the substring method.

String text = "Dart is fun!";
String subText = text.substring(0, 4);
print(subText); // "Dart"

5. Searching:

You can search for substrings within a string using contains, startsWith, and endsWith methods.

String text = "Dart is fun!";
bool containsDart = text.contains("Dart"); // true
bool startsWithDart = text.startsWith("Dart"); // true
bool endsWithFun = text.endsWith("fun!"); // true

6. Splitting:

You can split a string into a list of substrings using the split method.

String text = "apple,banana,orange";
List<String> fruits = text.split(",");
print(fruits); // ["apple", "banana", "orange"]

7. Trimming:

You can remove leading and trailing whitespace characters from a string using trim, trimLeft, and trimRight methods.

String text = "   Hello, World!   ";
String trimmedText = text.trim();
print(trimmedText); // "Hello, World!"

8. Converting to Upper/Lower Case:

You can convert a string to uppercase or lowercase using toUpperCase and toLowerCase methods.

String text = "Hello, World!";
String upperCaseText = text.toUpperCase(); // "HELLO, WORLD!"
String lowerCaseText = text.toLowerCase(); // "hello, world!"

These are some of the common string operations in Dart. String manipulation is an important part of many Dart applications, especially when dealing with user input and text processing.