Variables_DataTypes_Dart_Presentation.pptx

Variables_DataTypes_Dart_Presentation.pptx

• 1.
  Variables, Data Types& Operators in Dart A Practical Guide for Beginners
• 2.
  Introduction • • Explorevariables, data types, and operators in Dart. • • Fundamental concepts for robust applications.
• 3.
  Declaring Variables • •Use `var` keyword to declare variables. • Example: var message = "Hello, Dart!";
• 4.
  Different Data Types •• Integers: int score = 42; • • Strings: String name = "John"; • • Booleans: bool isRaining = true; • • Lists: List<int> numbers = [1, 2, 3]; • • Maps: Map<String, int> ages = {"Alice": 25, "Bob": 30};
• 5.
  Type Inference &Explicit Types • • var age = 23; // Type inferred as int • • String name = "Alice"; // Explicit type declaration
• 6.
  Constants & FinalVariables • • const PI = 3.14159; // Compile-time constant • • final appName = "My App"; // Runtime constant
• 7.
  Arithmetic Operators • •+, -, *, /, % • Example: int sum = a + b;
• 8.
  Comparison Operators • •==, !=, <, >, <=, >= • Example: bool isEqual = a == b;
• 9.
  Logical Operators • •&& (AND), || (OR), ! (NOT) • Example: bool result = isTrue && isFalse;
• 10.
  String Methods • •length, toUpperCase(), toLowerCase(), substring() • Example: message.substring(0, 5);
• 11.
  Conclusion • • Learnedabout Dart variables, data types, and operators. • • Explored constants, final variables, and string manipulation.