1cdf0e10cSrcweir<?xml version="1.0" encoding="UTF-8"?> 2cdf0e10cSrcweir 3d33d0967SAndrew Rist<!--*********************************************************** 410be1ba9Smseidel * 5d33d0967SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 6d33d0967SAndrew Rist * or more contributor license agreements. See the NOTICE file 7d33d0967SAndrew Rist * distributed with this work for additional information 8d33d0967SAndrew Rist * regarding copyright ownership. The ASF licenses this file 9d33d0967SAndrew Rist * to you under the Apache License, Version 2.0 (the 10d33d0967SAndrew Rist * "License"); you may not use this file except in compliance 11d33d0967SAndrew Rist * with the License. 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Base e is a constant with an approximate value of 2.718282...</paragraph> 47cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3153968" xml-lang="en-US" l10n="U" oldref="10">You can calculate logarithms to any base (n) for any number (x) by dividing the natural logarithm of x by the natural logarithm of n, as follows:</paragraph> 48cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3145420" xml-lang="en-US" l10n="U" oldref="11">Log n(x) = Log(x) / Log(n)</paragraph> 49cdf0e10cSrcweir<embed href="text/sbasic/shared/00000003.xhp#errorcode"/> 50cdf0e10cSrcweir<embed href="text/sbasic/shared/00000003.xhp#err5"/> 51cdf0e10cSrcweir<paragraph role="heading" id="hd_id3155131" xml-lang="en-US" level="2" l10n="U" oldref="12">Example:</paragraph> 52cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3152463" xml-lang="en-US" l10n="U" oldref="13">Sub ExampleLogExp</paragraph> 53cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3145750" xml-lang="en-US" l10n="U" oldref="14">Dim a as Double</paragraph> 54cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3151116" xml-lang="en-US" l10n="U" oldref="15">Dim const b1=12.345e12</paragraph> 55cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3146985" xml-lang="en-US" l10n="U" oldref="16">Dim const b2=1.345e34</paragraph> 56cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3148616" xml-lang="en-US" l10n="U" oldref="17">a=Exp( Log(b1)+Log(b2) )</paragraph> 57cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3149262" xml-lang="en-US" l10n="U" oldref="18">MsgBox "" & a & chr(13) & (b1*b2) ,0,"Multiplication by logarithm function"</paragraph> 58cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3155411" xml-lang="en-US" l10n="U" oldref="19">end sub</paragraph> 59cdf0e10cSrcweir</body> 60cdf0e10cSrcweir</helpdocument> 61