Programming Fundamentals

1. Variables

2. Strings

3. Conditions

4. Loops

5. Functions

6. Lists

7. Map

8. Classes

9. Async and await

10. File handling

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Variables

• Variables are containers that store value.

Declaration:

• declaring variables with "var".

var name = "flutter";

Type inference:

• Dart automatically determines the variables type based on their assigned values.

• In the above code block the variable "name" is automatically inferred to be string.

Explicit Typing:

• You can also specify variables type in dart.

String city = "Hyderabad";
int age = 23;
double pi = 3.14;
bool isRainy = true;

Mutability:

• Variables can be mutable (changeable) or immutable (unchangeable) using "final" or "const" keyword.

final name = "dart";
const pi = 3.14;

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Strings

Creating Strings:

• You can create strings with single quote ('') or double quote ("") in Dart.

var bob = 'hello';
var candy = "hello";

• For multiple line Strings use triple quotes (''' or """)

var triple = """
Triple quotes are used to write 
multiple lines in 
strings
"""

String interpolation:

• Embed expressions inside string using ${}

var name = "dart";
var greeting = "hello, $name"
var length = "The length is ${name.length}"

Concatenation:

use '+' operator or simply place strings next to each other.

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