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What is a dynamic type in Dart?
Maria ElijahDart dynamic type
In Dart, when a variable is declared as a dynamic type, it can store any value, such as int and float.
The value of a dynamic variable can change over time within the program.
Syntax
dynamic variable_name
Code
The following code shows how to implement the dynamic type in Dart.
// dynamic type
void main()
{
// declaring and assigning value to variable a
// of type dynamic
dynamic a = 40;
print(a);
// reassigning value to a
a= "Dart";
print(a);
// reassigning value to a
a= 10.4;
print(a);
}Using dynamic type
Explanation
Here is a line-by-line explanation of the above code:
- Line 3: We create the
main()function. - Line 7: We declare a variable named
aofdynamictype and assign anintegervalue to it. - Line 8: We print the value.
- Line 10: We reassign a
stringvalue to it. - Line 11: We print the value.
- Line 13: We reassign a
floatvalue to it. - Line 14: We print the value.
Note: Once a variable is declared as a
dynamictype, its value can change over time within the program.
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