Variables in Java
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Fundamentals of Programming with Java
All programming languages share common traits- Java in particular is an Object
Oriented programming language- Everything can be represented as an Object (think
of of nouns in the English language)- a Chair, a Desk, a Person, a User etc.
Variables
What is a variable?- In computer programming, a variable is a storage location
and an associated symbolic name which contains some known or unknown quantity or
information, a value.
cryptic, here's what it really means:- Store information for later use, and
store it in a way that you can reference it- this is known as a variable name!-
variable name is just a word, a word that represent's what you're storing
if you go to a website, website asks for your name, you type it in, boom
that's a variable
Variables have Types
String - store a regular sentence (alphanumeric - numbers and letters)-
Integer - Whole numbers on (no decimals)- Double - Number with decimals (about
16 significant figures)- Float - Number with fewer decimal places than Double
(about 8 significant figures)
Your Homework
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