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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