Module | ActionView::Helpers::NumberHelper
In: | lib/action_view/helpers/number_helper.rb

Provides methods for converting a number into a formatted string that currently represents one of the following forms: phone number, percentage, money, or precision level.

### Methods

human_size number_to_currency number_to_human_size number_to_percentage number_to_phone number_with_delimiter number_with_precision

### Public Instance methods

human_size(size)

Alias for number_to_human_size

number_to_currency(number, options = {})

Formats a `number` into a currency string. The `options` hash can be used to customize the format of the output. The `number` can contain a level of precision using the `precision` key; default is 2 The currency type can be set using the `unit` key; default is "$" The unit separator can be set using the `separator` key; default is "." The delimiter can be set using the `delimiter` key; default is "," Examples:

       number_to_currency(1234567890.50)     => $1,234,567,890.50
       number_to_currency(1234567890.506)    => $1,234,567,890.51
       number_to_currency(1234567890.50, {:unit => "&pound;", :separator => ",", :delimiter => ""}) => &pound;1234567890,50

number_to_human_size(size)

Returns a formatted-for-humans file size.

Examples:

      human_size(123)          => 123 Bytes
      human_size(1234)         => 1.2 KB
      human_size(12345)        => 12.1 KB
      human_size(1234567)      => 1.2 MB
      human_size(1234567890)   => 1.1 GB

number_to_percentage(number, options = {})

Formats a `number` as into a percentage string. The `options` hash can be used to customize the format of the output. The `number` can contain a level of precision using the `precision` key; default is 3 The unit separator can be set using the `separator` key; default is "." Examples:

      number_to_percentage(100)    => 100.000%
      number_to_percentage(100, {:precision => 0}) => 100%
      number_to_percentage(302.0574, {:precision => 2})  => 302.06%

number_to_phone(number, options = {})

Formats a `number` into a US phone number string. The `options` can be a hash used to customize the format of the output. The area code can be surrounded by parentheses by setting +:area_code+ to true; default is false The delimiter can be set using +:delimiter+; default is "-" Examples:

      number_to_phone(1235551234)   => 123-555-1234
      number_to_phone(1235551234, {:area_code => true})   => (123) 555-1234
      number_to_phone(1235551234, {:delimiter => " "})    => 123 555 1234
      number_to_phone(1235551234, {:area_code => true, :extension => 555})  => (123) 555-1234 x 555

number_with_delimiter(number, delimiter=",")

Formats a `number` with a `delimiter`. Example:

       number_with_delimiter(12345678) => 12,345,678

number_with_precision(number, precision=3)

Formats a `number` with a level of `precision`. Example:

       number_with_precision(111.2345) => 111.235

[Validate]