Boxlang 1.x Stable Released
BoxLang : A Modern Dynamic JVM Language
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On this page
  • Numeric Type
  • Operators & Functions
  • Casting/Parsing
  • Is it a number?
  • Repeating Instructions

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  1. BoxLang Language
  2. Syntax & Semantics

Numbers

Integers and floats to rule the world!

PreviousStringsNextJSON

Last updated 10 months ago

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There are two basic kinds of numbers in BoxLang: integers (whole numbers) and floats (have a decimal point). Internally, each BoxLang engine treats them uniquely and backs up each numerical value as a Java class: java.lang.Double or java.lang.Integer.

Type
Size (bits)
Min Value
Max Value

Integer

32

-2,147,483,648 (-231)

2,147,483,647 (231 - 1)

Type
Size (bits)
Significant Bits
Exponent Bits
Decimal Digits

Double

64

53

11

15-16

Tip: If you are dealing with currency or tracking precision, please read about precisionEvaluate() to represent big numbers and precision results:

a = 1;
b = 50.1;
writeOutput( a * b );

Also, note that BoxLang will do the auto-casting for you when converting between integers and doubles.

Numeric Type

Once we start looking at functions/closures and lambdas, you will see that you can also type the incoming arguments and results of functions. You also won't need to type it with integer or float, just as numeric:

numeric function add( numeric a, numeric b ){
    return a + b;
}

Operators & Functions

BoxLang offers tons of mathematical and functions:

abs
aCos
arrayAvg

arraySum

aSin

atn

bitAnd

bitMaskClear

bitMaskRead

bitMaskSet

bitNot

bitOr

bitSHLN

bitSHRN

bitXor

ceiling

cos

decrementValue

expt

fix

floor

formatBaseN

incrementValue

inputBaseN

int

log

log10

max

min

pi

precisionEvaluate

rand

randomize

randRange

round

sgn

sin

sqr

tan

Casting/Parsing

toNumeric( "29.5" )
toNumeric( "FF0011", "hex" )
toNumeric( "1010", "bin" )

Is it a number?

BoxLang provides the isNumeric() function to determine if the passed value can be converted to a numeric value.

isNumeric( 23 ) // yes
isNumeric( "twenty" ) // no
isNumeric( 5e2 ) // yes

Repeating Instructions

Number variables can be used to repeat instructions. Like in many other languages, BoxLang supports the for, while and loop constructs:

for( var i = 0; i <= 10; i++ ){
    writeOutput( "Showing day " & i );
}

i =1;
while( i <= 10 ){
    writeOutput( "Showing day " & i++ );
}

Please note that the syntax varies from tag to script, so refer to the docs for subtle differences. Please also note that you can iterate over structures, arrays, queries, and objects in BoxLang; we will see this in later sections.

BoxLang also has a toNumeric() function that you can use to cast a value to a number using different .

The parseNumber() is also used to convert a string number into a numeral system ()

In a , the radix or base is the number of unique , including the digit zero, used to represent numbers. For example, for the (the most common system in use today) the radix is ten, because it uses the ten digits from 0 through 9.

See for more information

radixes
https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/conversion/parsenumber
positional numeral system
digits
decimal system
https://boxlang.ortusbooks.com/boxlang-language/reference/components/system/loop
https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/precisionevaluate
https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math
operators