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End Module</lang>
=={{header|Wren}}==
{{trans|Go}}
Although the third example here works correctly, it is not safe to use this script for numbers with an absolute magnitude >= 2^53 as integers cannot be expressed exactly by Wren's Num type beyond that limit.
<lang ecmascript>var small = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven",
"twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"]
var tens = ["", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"]
var illions = ["", " thousand", " million", " billion"," trillion", " quadrillion", " quintillion"]
var say
say = Fn.new { |n|
var t = ""
if (n < 0) {
t = "negative "
n = -n
}
if (n < 20) {
t = t + small[n]
} else if (n < 100) {
t = t + tens[(n/10).floor]
var s = n % 10
if (s > 0) t = t + "-" + small[s]
} else if (n < 1000) {
t = t + small[(n/100).floor] + " hundred"
var s = n % 100
if (s > 0) t = t + " " + say.call(s)
} else {
var sx = ""
var i = 0
while (n > 0) {
var p = n % 1000
n = (n/1000).floor
if (p > 0) {
var ix = say.call(p) + illions[i]
if (sx != "") ix = ix + " " + sx
sx = ix
}
i = i + 1
}
t = t + sx
}
return t
}
for (n in [12, 1048576, 9e18, -2, 0]) System.print(say.call(n))</lang>
{{out}}
<pre>
twelve
one million forty-eight thousand five hundred seventy-six
nine quintillion
negative two
zero
</pre>
=={{header|XPL0}}==
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