Groovy is optional

Groovy is an "optional" type of language, and this distinction is an important language when understanding the fundamentals of language. J ava is a "strong" type of language compared to Java, so the compiler knows all types of each variable and can understand and respect contracts at compile time. me.

When writing code in Groovy, developers have the flexibility to provide types or not. This provides some simple implementations and, when properly utilized, can serve your application in a powerful and dynamic way.

In Groovy, the optional typing is done through the 'def' keyword. Here's an example of using the def method -

class Example { 
   static void main(String[] args) { 
      // Example of an Integer using def 
      def a = 100; 
      println(a); 
		
      // Example of an float using def 
      def b = 100.10; 
      println(b); 
		
      // Example of an Double using def 
      def c = 100.101; 
      println(c);
		
      // Example of an String using def 
      def d = "HelloWorld"; 
      println(d); 
   } 
} 

From the above program, we can see that we do not declare individual variables as Integer, float, double, or string, even if they contain values of these types.

When we run the program above, we will get the following results -

100 
100.10 
100.101
HelloWorld

Optional typing can be a powerful utility during development, but when code becomes too large and complex, it can lead to maintainability issues during the later development phase.

To learn how to use optional input in Groovy without getting your code base into unresumable chaos, it's a good idea to use the concept of "duck input" in your application.

If we use duck to rewrite the code above, it will look like the one given below. Variable names have more names than they represent, which makes the code easier to understand.

class Example { 
   static void main(String[] args) { 
      // Example of an Integer using def 
      def aint = 100; 
      println(aint); 
		
      // Example of an float using def 
      def bfloat = 100.10; 
      println(bfloat); 
		
      // Example of an Double using def 
      def cDouble = 100.101; 
      println(cDouble);
		
      // Example of an String using def 
      def dString = "HelloWorld"; 
      println(dString); 
   } 
}