Script Editor won't accept Code cause "Illegal Syntax"

[speckford123]

Oh yeah, I didn't even notice the period at first glance when I looked at the original post, haha
Glad it's all sorted out

[bat78]

For the sake of argument CONSTANT refers to either a

• character literal 'a'
• double literal 0.05
• float literal 0.05F
• integer literal 360
• long integer literal 360L
• string literal "Hello World"

i.e values passed directly, in read-only way.
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Variables are something slightly different as they store the value in read/write memory, which means they can be changed/accessed at some point(s) through their name identifier.
A variable value cannot be changed generally if the variable is declared with the const type qualifier (which makes it a constant variable) or passed as a function argument.
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xvelocity = 40.0;

In that case, xvelocity is a variable type double and we change it (by assigning) to contain 40.0 which is passed as a double literal.
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A MACRO is what actually can be identified (adhering the syntactic standards) by its capitalized name identifier
a MACRO is a textual replacement of code

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#define XVEL xvelocity

Will define XVEL to be used as if xvelocity is used instead.

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#define XVEL_IS_40 xvelocity = 40.0

Can be used like that

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XVEL_IS_40;

instead of:

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xvelocity = 40.0;

Although I would prefer a MACRO function for such preemption (but that will go again way too far)