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And another point that I want to actually explain about the variables is that you can actually declare



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different variables with different names.



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OK.



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You can't declare different variables of it actually the same name.



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For example if I just want to create another variable with the data type in it.



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And again if I want to actually copy and paste this variable name OK for this variable.



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For this new variable.



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And then if you want to actually assign a value to this variable as you can see it's now showing us



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an error.



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Ok so if my heart can hover my mouse pointer over the error area here as you can see it says duplicate



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local variable variable name.



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So now it's complaining that we have actually duplicated this variable name here.



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So we just need to change this second variable name and as you can see I changed this second variable



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name to variable names.



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Now the error is gone.



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OK.



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As I said before variables are nothing but reserved memory locations to store values are great and variables



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are just actually placeholders for data in our program.



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This means that when you create a variable in your program OK you reserve some space in memory based



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on the data type of a variable.



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The operating system allocates memory and decides what can be stored in the reserved memory.



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OK so by assigning different data types to variables you can store integers decimals or characters in



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those variables.



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OK and there are two data types in Java.



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OK the first one is primitive data types OK.



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Which you are already familiar with like this.



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Int data type this into data type is actually primitive data type.



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OK.



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And the second one is object or actually reference



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data types.



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For now just ignore this object or reference data types or later in the section.



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I'll teach you more about these actual data types but for now we just want to focus on primitive data



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types and I think that's enough for this tutorial.



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And in the next year or Oriol I'm going to teach you more about primitive data types and how you can



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use them in your job programs.



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OK so thanks for watching and I'll see you in the next tutorial.