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<title>Level 2 Final Variables</title>
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    <h2>Final Variables</h2>
<p class="normal">
Sometimes when programming, we want to create variables that never change. <br>
In Java, you can use the keyword <font color="green">final</font> to make sure that your variables can't be changed.<br>
It is a programming convention to make static and final variables <u>all capital letters</u> so that they are easy to identify in your code.<br>
<br>
EXAMPLE:
</p>
 <p class="code">
double pi = 3.14159265359;<br>
<br>
pi = 7.7; // This is perfectly valid.<br>
<br>
System.out.println(pi); // This prints out 7.7.<br>
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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<p class="code">
final double PI = 3.14159265359; //notice we added "final"<br>
<br>
PI = 7.7; //This will cause an error because PI had been labeled as final.<br>
<br>
System.out.println(pi); // It still prints out 3.14159265359.<br>
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