Boundaries

boundaries are a feature of int and float types

they allow you to specify a range for numerical values

syntax

int<start..end>
float<start..end>

start is the minimum allowed value. end is the maximum allowed value.

example

egg age int<0..120> = 25
egg temperature float<-273.15..10000>

Here:

• age cannot be less than 0 or greater than 120
• temperature cannot go below absolute zero

runtime behavior

ff a value is assigned outside the boundary range, the program will produce an error.

Example:

age int<0..120> = 200

output:

runtime error at 1:4: value 200 above maximum 120

using boundaries in function parameters

fun setVolume(level int<0..100>) {
    putln(level)
}

this guarantees the function only receives valid values

notes

• boundaries work with both int and float
• the range is inclusive, meaning the start and end values are allowed
• boundaries are checked when assigning values