Variables
Formulas are often composed of several separate calculations. Therefore, it is necessary to store 
intermediate results in memory. To do this, you must use variables.
Identifiers are used to refer to variables. An identifier must start with a letter, followed by one or 
more letters, digits or the underscore character "_". Here are some examples of valid identifiers:
x
MyOwnVariable
var_32
It does not matter if the letters are lower  or uppercase, so "myvar" and "MyVar" represent the same 
variable. Some identifiers (called 
keywords
) are reserved by the compiler for other purposes: you 
cannot use them as variables.
Before you can read from a variable, you must first write to it. To do this, use the = (assignment) 
operator:
x = 
3
y = 
3 
+ 
28 
/ 
7
The variable is created when it is first written to. By default, the 
type
 of the variable is complex, but 
you can change that by placing a type keyword (bool, int, float or complex) in front of the 
assignment. Alternatively, you can declare the variable before using it.
int 
i
i = 
2
int 
x = 
3
bool 
MyBooleanVariable = x > 
3
Assignments are 
expressions
 themselves, so their result can be assigned again. This example gives 
both x and y the value 1:
x = y = 
1
To read from a variable, use the identifier in an expression. This example reads the value in x and 
stores it in y:
y = x
Of course, you can also perform calculations when doing this:
y = x * 
3 
+ 
7
Next: 
Parameters
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