Answer:
Great question!
A Variable declaration is just you creating a variable to hold your data.
Some of the different types of data type are doubles, int, strings
those hold certain type of data.
Explanation:
An example is:
//I want to make a data that says Hi I am a computer programmer!
//Define the variable
String WhoIam = "Hi I am a computer programmer!";
//I want to output the variable
System.out.print(WhoIam);
//output
Hi I am a computer programmer!
Hope this helped!
