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Predefined variables

ASTER runtime starts with several variables predefined, representing constants useful for writing programs in clear and concise way.

These variables are not constants! So they can be UNSET or their values can be changed within the program. If that will be the case, the program could stop making sense!

Name

Value

Comments

_PI_

3.14159265358979323846264...

Mathematical constant π

_E_

2.71828182845904523536028...

Mathematical constant e, base of the natural logarithm

_EMPTY_

Empty string

_CR_

\r

Carriage return symbol

_LF_

\n

Linefeed symbol

_TAB_

\t

Tab symbol

_TRUE_

X
single capital X character

Represents value of true logical expression

_FALSE_

single SPACE character

Represents value of false logical expression

_NULL_

implementation specific

Represents a null value in JSON

_NULL_ARRAY_

implementation specific

Represents an empty array [] in JSON

_NULL_OBJECT_

implementation specific

Represents an empty object {} in JSON

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