| <!doctype html> |
| <!-- Generated by FreeMarker/Docgen from DocBook --> |
| <html lang="en" class="page-type-section"> |
| <head prefix="og: http://ogp.me/ns#"> |
| <meta charset="utf-8"> |
| <title>#{...}: Numerical interpolation - FreeMarker Manual</title> |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <meta name="format-detection" content="telephone=no"> |
| <meta property="og:site_name" content="FreeMarker Manual"> |
| <meta property="og:title" content="#{...}: Numerical interpolation"> |
| <meta property="og:locale" content="en_US"> |
| <meta property="og:url" content="http://example.com/ref_depr_numerical_interpolation.html"> |
| <link rel="canonical" href="http://example.com/ref_depr_numerical_interpolation.html"> |
| <link rel="icon" href="favicon.png" type="image/png"> |
| <link rel="stylesheet" type="text/css" href="docgen-resources/docgen.min.css?1594338517553"> |
| </head> |
| <body itemscope itemtype="https://schema.org/Code"> |
| <meta itemprop="url" content="http://example.com/"> |
| <meta itemprop="name" content="FreeMarker Manual"> |
| |
| <!--[if lte IE 9]> |
| <div style="background-color: #C00; color: #fff; padding: 12px 24px;">Please use a modern browser to view this website.</div> |
| <![endif]--><div class="header-top-bg"><div class="site-width header-top"><a class="logo" href="http://example.com" role="banner"> <img itemprop="image" src="logo.png" alt="My Logo"> |
| </a></div></div><div class="header-bottom-bg"><div class="site-width search-row"><a href="index.html" class="navigation-header">FreeMarker Manual</a><div class="navigation-header"></div></div><div class="site-width breadcrumb-row"><ul class="breadcrumb" itemscope itemtype="http://schema.org/BreadcrumbList"><li class="step-0" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="index.html"><span itemprop="name">FreeMarker Manual</span></a></li><li class="step-1" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="ref.html"><span itemprop="name">Reference</span></a></li><li class="step-2" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="ref_deprecated.html"><span itemprop="name">Deprecated FTL constructs</span></a></li><li class="step-3" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="ref_depr_numerical_interpolation.html"><span itemprop="name">#{...}: Numerical interpolation</span></a></li></ul><div class="bookmarks" title="Bookmarks"><span class="sr-only">Bookmarks:</span><ul class="bookmark-list"><li><a href="alphaidx.html">Index</a></li><li><a href="gloss.html">Glossary</a></li><li><a href="ref.html">Reference</a></li><li><a href="app_faq.html">FAQ</a></li><li><a href="preface.html#test_target">Bőregér</a></li></ul></div></div></div> <div class="main-content site-width"> |
| <div class="content-wrapper no-toc"> |
| <div id="table-of-contents-wrapper" class="col-left"> |
| </div> |
| <div class="col-right"><div class="page-content"><div class="page-title"><div class="pagers top"><a class="paging-arrow previous" href="ref_depr_oldsyntax.html"><span>Previous</span></a><a class="paging-arrow next" href="app.html"><span>Next</span></a></div><div class="title-wrapper"> |
| <h1 class="content-header header-section1" id="ref_depr_numerical_interpolation" itemprop="headline">#{...}: Numerical interpolation</h1> |
| </div></div><div class="page-menu"> |
| <div class="page-menu-title">Page Contents</div> |
| <ul><li><a class="page-menu-link" href="#autoid_131" data-menu-target="autoid_131">Synopsis</a></li><li><a class="page-menu-link" href="#autoid_132" data-menu-target="autoid_132">Description</a></li></ul> </div><p>Deprecated: Use the <a href="ref_directive_setting.html#ref.setting.number_format"><code>number_format</code> |
| setting</a> and <a href="ref_builtins_number.html#ref_builtin_string_for_number">the |
| <code>string</code> built-in</a> instead. For formatting for |
| computer audience (i.e., no localized formatting) use the <a href="ref_builtins_number.html#ref_builtin_c"><code>c</code> built-in</a> (like |
| <code class="inline-code"><em class="code-color">number</em>?c</code>).</p> |
| |
| |
| |
| |
| <h2 class="content-header header-section2" id="autoid_131">Synopsis</h2> |
| |
| |
| |
| <pre class="metaTemplate"><code class="inline-code">#{<em class="code-color">expression</em>}</code> |
| or |
| <code class="inline-code">#{<em class="code-color">expression</em>; <em class="code-color">format</em>}</code></pre> |
| |
| |
| <p>Where:</p> |
| |
| <ul> |
| <li> |
| <code class="inline-code"><em class="code-color">expression</em></code>: |
| expression that can be evaluated as a number. |
| </li> |
| |
| <li> |
| <code class="inline-code"><em class="code-color">format</em></code>: |
| optional format specifier. |
| </li> |
| </ul> |
| |
| |
| |
| |
| |
| <h2 class="content-header header-section2" id="autoid_132">Description</h2> |
| |
| |
| <p>The numerical interpolation is used to output a number value. |
| If the expression doesn't evaluate to a number, the evaluation ends |
| with an error.</p> |
| |
| <p>The optional format specifier specifies the minimum and the |
| maximum number of displayed fractional digits using syntax |
| <code class="inline-code">m<em class="code-color">min</em>M<em class="code-color">max</em></code>. |
| For example, <code class="inline-code">m2M5</code> means "at least two, at most |
| five fractional digits". The minimum or the maximum specifier part |
| can be omitted. If only the minimum is specified, the maximum is |
| equal to the minimum. If only maximum is specified, the minimum is |
| 0.</p> |
| |
| <p>The decimal separator character of the output is |
| internationalized (according the current locale setting), which |
| means that it is not necessarily a dot.</p> |
| |
| <p>Unlike <code class="inline-code">${...}</code>, <code class="inline-code">#{...}</code> |
| ignores the <a href="ref_directive_setting.html#ref.setting.number_format"><code>number_format</code> |
| setting</a>. This is actually a backward compatibility quirk, but |
| it can be useful when you print numbers in situations like |
| <code class="inline-code"><a href="quertyDatabase?id=#{id}"></code>, where |
| you surely don't want grouping separators or something fancy like |
| that. However, starting from FreeMarker 2.3.3 rather use the <a href="ref_builtins_number.html#ref_builtin_c"><code>?c</code> built-in</a> for |
| this purpose, like <code class="inline-code"><a |
| href="quertyDatabase?id=${id?c}"></code>.</p> |
| |
| <p>Examples. Assume that <code class="inline-code">x</code> is |
| <code class="inline-code">2.582</code> and <code class="inline-code">y</code> is |
| <code class="inline-code">4</code>:</p> |
| |
| |
| |
| <div class="code-wrapper"><pre class="code-block code-template"> <#-- If the language is US English the output is: --> |
| #{x} <#-- 2.582 --> |
| #{y} <#-- 4 --> |
| #{x; M2} <#-- 2.58 --> |
| #{y; M2} <#-- 4 --> |
| #{x; m1} <#-- 2.6 --> |
| #{y; m1} <#-- 4.0 --> |
| #{x; m1M2} <#-- 2.58 --> |
| #{y; m1M2} <#-- 4.0 --></pre></div> |
| <div class="bottom-pagers-wrapper"><div class="pagers bottom"><a class="paging-arrow previous" href="ref_depr_oldsyntax.html"><span>Previous</span></a><a class="paging-arrow next" href="app.html"><span>Next</span></a></div></div></div></div> </div> |
| </div> |
| <div class="site-footer"><div class="site-width"><div class="footer-bottom"> <p class="last-generated"> |
| Last generated: |
| <time itemprop="dateModified" datetime="2020-07-09T23:48:37Z" title="Thursday, July 9, 2020 11:48:37 PM GMT">2020-07-09 23:48:37 GMT</time> </p> |
| <p class="copyright"> |
| © <span itemprop="copyrightYear">1999</span>–2020 |
| <a itemtype="http://schema.org/Organization" itemprop="copyrightHolder" href="https://apache.org/">The Apache Software Foundation</a> </p> |
| </div></div></div></body> |
| </html> |
