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85 lines
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HTML
85 lines
4.1 KiB
HTML
<!DOCTYPE html>
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<head>
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<meta charset="utf-8">
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<title>Arithmetic</title>
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<meta name="description" content="">
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<div class="container center">
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<h1>Arithmetic</h1>
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<h3 class="subtitle">Doing math like a pro</h3>
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<div class="grid-code"><div class="doc"></div><div class="code"><pre><code class="language-php"><?php
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</code></pre></div><div class="doc">Now that we know how to create variables, let's look at doing some math.</div><div class="code"><pre><code class="language-php">$a = 1;
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$b = 2;
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</code></pre></div><div class="doc">To add two values, use the plus symbol.</div><div class="code"><pre><code class="language-php">$c = $a + $b;
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</code></pre></div><div class="doc">To subtract, use the minus symbol.</div><div class="code"><pre><code class="language-php">$c = $b - $a;
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</code></pre></div><div class="doc">To multiply two values, use an asterisk.</div><div class="code"><pre><code class="language-php">echo $a * $b;
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</code></pre></div><div class="doc">To divide values, use a forward slash.</div><div class="code"><pre><code class="language-php">echo $b / $a;
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</code></pre></div><div class="doc">PHP uses the percent symbol for calculating the modulus of two numbers. The modulus is calculated by dividing two numbers and returning the remainder of the result. So, in this example, the value of $modulo will be 0.</div><div class="code"><pre><code class="language-php">$modulo = 10 % 5;
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</code></pre></div><div class="doc">You can also use double asterisks to calculate a number to the power of another number. The following statement will print 25.</div><div class="code"><pre><code class="language-php">echo 5 ** 2;
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</code></pre></div></div>
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<div class="table-of-contents">
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<h4>Table of Contents</h4>
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<a href="/index.html">Preface</a>
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<ol>
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<li><a href="/basics.html">Basics</a></li>
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<li><a href="/variables.html">Variables</a></li>
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<li><a href="/arithmetic.html">Arithmetic</a></li>
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<li><a href="/comparisons.html">Comparisons</a></li>
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<li><a href="/boolean-logic.html">Boolean Logic</a></li>
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<li><a href="/conditionals.html">Conditionals</a></li>
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<li><a href="/loops.html">Loops</a></li>
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<li><a href="/arrays.html">Arrays</a></li>
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<li><a href="/functions.html">Functions</a></li>
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<li><a href="/classes.html">Classes</a></li>
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</ol>
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<a href="/credits.html">Credits</a>
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</body>
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</html>
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