var vs dynamic in Dart

In Dart, both var and dynamic can be used to declare variables without explicitly specifying their types, but they have important differences:

var:

Type Inference: When you declare a variable using var, Dart infers its type based on the assigned value. Once inferred, the variable's type cannot change.

Example:

  dartCopy codevar name = 'John'; // Inferred as String
  name = 'Doe'; // Allowed
  name = 123; // Error: A value of type 'int' can't be assigned to a variable of type 'String'

dynamic:

No Type Safety: Variables declared with dynamic can change their type at runtime. This offers flexibility but at the cost of type safety.
Example:
```
  dartCopy codedynamic value = 'Hello'; // Initially a String
  value = 42; // Now an int, allowed
  value = true; // Now a bool, also allowed
```
Type Safety:
- var: Provides type safety after the initial assignment. The type cannot change.
- dynamic: Does not provide type safety. The type can change at any time.

Use Case:

- var: Use when the type of the variable is known and should remain consistent.
  - dynamic: Use when the type of the variable can change, or when you're dealing with APIs or data structures where the type is not known in advance.

Choosing between var and dynamic depends on your need for type safety and flexibility. In most cases, var is preferred for its type safety benefits.

Understanding var vs dynamic in Dart

Type Safety:

Use Case: