Control flow

Data types

Operators


Variables are the key to unlocking your code's potential - learn how to use them and reap the results!

When it comes to programming, variables are an essential part of the process. In simple terms, a variable
is a way to store and access data within a program. It's like a container that holds a value, which can be
changed or updated as needed.

## Why are variables important?

Without them, our programs wouldn't be able to adapt and change
based on user input or other external factors. Imagine trying to write a program without the ability to store
or manipulate data - it would be incredibly difficult and inefficient.

## How do variables work?

First, you need to give your variable a name and, often, a data type.
For example, you might create a variable called "age" and assign it the data type "integer" (a whole number).
Then, you can assign a value to that variable, like "25".

Example:

```java
int age = 25;
```

Once you have a variable set up, you can use it in your program by referencing its name. For instance, you
might create a simple program that calculates the number of days someone has been alive by multiplying their
age by 365. In this case, you would use the "age" variable in your calculation to get the correct result.

But that's not all - variables can also be modified and updated as needed. For example, if the user of your
program changes their age, you can simply update the value of the "age" variable and your program will continue
to work correctly. This is a big part of what makes variables so powerful and useful in programming.

## Conclusion

Variables are an essential part of programming. They allow us to store and manipulate data
within our programs, making them more adaptable and efficient.

By giving our variables names and data types, we can use them in our calculations and update them as needed.


Programmers' Garden

Variables

More concepts you should know about

Control flow

Data types

Operators