Java Video Tutorial 3: Variables and Arithmatic (Part1)

Part 1 will describe how to declare and assign variables in java aswell as discussing the various data types.

Part 2 shows you how to perform simple arithmatic and display variables through an example program.

Category:

Howto & Style

Tags:

• java
• video
• tutorial
• lesson
• programming
• variables
• arithmatic
• part1
• data
• types

[aphonik]

There is no difference in those two statements, both the variables hold a value of 50. Only the data type differs. Bytes can hold values from -128 to 127. Int's can hold numbers from -2,147,483,648 to 2,147,483,647. So if I wanted to hold a value of 1 billion (1,000,000,000) I wouldn't be able to store that in an byte. I would however be able to store it in an int.

=]

[5h4rk]

So, if I want to store 100, it is recommendable to use byte instead of int? Or Short for 500? Thus we can save space on the memory? Is that right?

[aphonik]

That is correct, you will save memory space. However, just make sure you don't store a value thats higher than the maximum the data type can hold - or some strange stuff will happen =]

[mayavenkat]

Thanks! this really helped me out! and btw, i love your accent! :D

[sergeantRC]

HAHAHA byte myVariable!!!

thanks for the vid!

[dbb008]

Please use a real editor. Newcomers who see this video will think that Notepad is acceptable as a programmer's editor and never find personal fulfillment.

[01Feb2011]

You assigned myFloat twice?

Even though they're two data types wouldn't it cause confusing if you called them for a argument?

[Kbster14]

Nice vid, but bump up the sound on ur mic plz :D

[sniperx15rulz]

and what is char used for im soooo lost...i should just watch em all b4 asking questions

[sniperx15rulz]

wat is boolean used for like idk wat is true or false like watever u mean omg its so hard to say ummm welll....fail;

[sniperx15rulz]

bite myvariable lol =]

[supernova360]

thank you for the videos! keep it up!

[jomann18]

Thank you very much for your tutorials! I learned a whole lot today!