<HTML ><HEAD ><TITLE >abs</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Mathematical Functions" HREF="ref.math.html"><LINK REL="PREVIOUS" TITLE="Mathematical Functions" HREF="ref.math.html"><LINK REL="NEXT" TITLE="acos" HREF="function.acos.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="ref.math.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.acos.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.abs" ></A >abs</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN44314" ></A ><P > (PHP 3, PHP 4 )</P >abs -- Absolute value</DIV ><DIV CLASS="refsect1" ><A NAME="AEN44317" ></A ><H2 >Description</H2 >mixed <B CLASS="methodname" >abs</B > ( mixed number)<BR ></BR ><P > Returns the absolute value of <TT CLASS="parameter" ><I >number</I ></TT >. If the argument <TT CLASS="parameter" ><I >number</I ></TT > is of type <A HREF="language.types.float.html" ><B CLASS="type" >float</B ></A >, the return type is also <A HREF="language.types.float.html" ><B CLASS="type" >float</B ></A >, otherwise it is <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A > (as <A HREF="language.types.float.html" ><B CLASS="type" >float</B ></A > usually has a bigger value range than <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >). </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN44333" ></A ><P ><B >Example 1. <B CLASS="function" >abs()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >$abs = abs(-4.2); // $abs = 4.2; (double/float) $abs2 = abs(5); // $abs2 = 5; (integer) $abs3 = abs(-5); // $abs3 = 5; (integer)</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="ref.math.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.acos.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Mathematical Functions</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.math.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >acos</TD ></TR ></TABLE ></DIV ></BODY ></HTML >