Var keyword in dart

var is the keyword of the dart which has the unique work on it self we can not declare var as a variable or any other place.

var used to declare a variable and once it's assign they automatically knows the type of data based on the assigned to the variable because Dart is an infer type language.

we can declare only one type of the data type as same variable such as we we declare var a = 10 than a has int type and now we can not pass any string value or double value in a variable , if we try this than we can face the error.

Here, I am providing the example of the use of var keyword.

  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'
  }

• In this code we have already declare " a " as int type so in second time we can not pass string value on " a " , we can only store int value in " a " variable.