# 
#  Dart `var` type

In Dart, when a variable is declared as a `var` type, it can hold any value such as `int` and `float`. 

The value of a `var` variable can not change within the program once it is initialized at declaration.

# 
## Syntax

---
```
var variable_name
```
---


##
## Example 1

The following code shows how to implement the `var` type in Dart.

void main() {
  var a;       // declaring a variable of type var
  a = 40;      // initializing variable a
  print(a);

  a = "Dart";  // reassigning string value to `a`
  print(a);

  a = 10.4;    // reassigning float value to `a`
  print(a);
}

# 
## Explanation

- Line 1–11: We create the `main()` function. Within the `main()`, we have the following:

  - Line 2: A variable named `a` of `var` type.

  - Line 3: We assign an `integer` value to it.

  - Line 4: We print the value of `a`.

  - Line 6: We reassign a `string` value to it.

  - Line 7: We print the value of `a`.

  - Line 9: We reassign a `float` value to it.

  - Line 10: We print the value of `a`.

# 
## Example 2

Let's try initializing at the point of declaring the variable and then reassigning a value to it. 

---
> **Note:** The following code will throw an error.

void main() {
  var a = 40;
  print(a);

  a = "Dart";
  print(a); // Error: A value of type 'String' can't be assigned to a variable of type 'int'
}


## Explanation

If we initialize a variable of type `var` at the point of declaration, we can't reassign a value to it.

What is a var type in Dart?

Var type in Dart allows holding any value, but once initialized, its type cannot change.

What is a var type in Dart?

Dart var type

Syntax

Example 1

Explanation

Example 2

Explanation

Dart `var` type