Format a float number as a pretty string:

import FormatNumber.Locales exposing (Locale, frenchLocale, spanishLocale, usLocale)


format { decimals = 2, thousandSeparator = ".", decimalSeparator = ",", negativePrefix = "−", negativeSuffix = "", positivePrefix = "", positiveSuffix = "" } 123456.789
--> "123.456,79"


format { decimals = 2, thousandSeparator = ",", decimalSeparator = ".", negativePrefix = "−", negativeSuffix = "", positivePrefix = "", positiveSuffix = "" } 1234.5567
--> "1,234.56"


format (Locale 3 "." "," "−" "" "" "") -7654.3210
--> "−7.654,321"


format (Locale 1 "," "." "−" "" "" "") -0.01
--> "0.0"


format (Locale 2 "," "." "−" "" "" "") 0.01
--> "0.01"


format (Locale 0 "," "." "−" "" "" "") 123.456
--> "123"


format (Locale 0 "," "." "−" "" "" "") 1e9
--> "1,000,000,000"


format (Locale 5 "," "." "−" "" "" "") 1.0
--> "1.00000"


format (Locale 2 "," "." "(" ")" "" "") -1.0
--> "(1.00)"


format usLocale pi
--> "3.14"


format { frenchLocale | decimals = 4 } pi
--> "3,1416"


format frenchLocale 67295
--> "67 295,000"


format spanishLocale e
--> "2,718"


format spanishLocale 67295
--> "67.295,000"


format usLocale 67295
--> "67,295.00"


format spanishLocale -0.1
--> "−0,100"


format spanishLocale -0.00099
--> "−0,001"


format usLocale 1e10
--> "10,000,000,000.00"


format usLocale -1e10
--> "−10,000,000,000.00"


format { usLocale | negativePrefix = "-" } -1.0
--> "-1.00"


format { usLocale | positivePrefix = "+" } 1.0
--> "+1.00"


format { usLocale | positiveSuffix = "+" } 1.0
--> "1.00+"


format usLocale 7.34767309e22
--> "73,476,730,900,000,000,000,000.00"


format usLocale 7.34767309e+22
--> "73,476,730,900,000,000,000,000.00"


format usLocale 7.34767309e-22
--> "0.00"

Humanize the decimal part of a float with different strategies to remove tail zeros:

import FormatNumber exposing (humanize)
import FormatNumber.Humanize exposing (ZeroStrategy(..))
import FormatNumber.Locales exposing (usLocale)


humanize usLocale RemoveZeros 10.00
--> "10"
humanize usLocale RemoveZeros 10.10
--> "10.1"


humanize usLocale KeepZeros 10.00
--> "10"
humanize usLocale KeepZeros 10.10
--> "10.10"