Variables

A variable is a place for storing a value, a constant is a place for storing a value which can never be changed

declaration and assignment

to declare a normal mutable, reassignable variable use egg

egg x = "wowie"

variables can also be declared without an initial value, like so

egg x

to declare a constant, a variable which cannot be changed, use rock

rock x = "i will never change"

if you try to assign a new value, you will across a Runtime error

rock x = "i will never change"

x = "i want to change"

output: runtime error at 3:2: cannot reassign to const: x

constants cannot be declared without an intitial value.

rock x

output: Runtime error at 1:5: const x must be initialised

you can also assign and declare multiple variables at the same time

rock a, b = 4, 2

putln("${a} ${b}")

output: 4 2

you can also just declare them without an inital value like normal

egg a, b

and also like single declaration, using multi constant declaration you must initialise it

rock a, b

output: runtime error at 1:5: constants, a, b, must be initialised

same principles for multi assignment

egg a, b

a, b = 4, 2

putln("${a} ${b}")

output: 4 2

you can assign and declare multiple variables to function return values and it will destructure it

fun operation(x int, y int) (int, int) {
    back x + y, x - y
}

egg a, b int = operation(5, 3)

putln(a, b)

output:

8
2

you can also do declaration blocks like in Go

egg (
  a = 1
  b = no
)

rock (
  x int = 4
  y bool = yes
)