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<div class="titlepage"><div><div><h4 class="title">
<a name="phoenix.lazy_list.tutorial_with_examples.arithmetic_functions"></a><a class="link" href="arithmetic_functions.html" title="Arithmetic functions">Arithmetic
functions</a>
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<p>
Assume the values
</p>
<pre class="programlisting"><span class="keyword">int</span> <span class="identifier">a</span> <span class="special">=</span> <span class="number">123</span><span class="special">;</span>
<span class="keyword">int</span> <span class="identifier">b</span> <span class="special">=</span> <span class="number">256</span><span class="special">;</span>
</pre>
<p>
The following are all valid expressions returning a+b
</p>
<pre class="programlisting"><span class="identifier">plus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">b</span><span class="special">)</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)()</span>
</pre>
<p>
The expressions can be combined like this
</p>
<pre class="programlisting"><span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">),</span><span class="identifier">b</span><span class="special">)()</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">b</span><span class="special">),</span><span class="identifier">b</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">),</span><span class="identifier">b</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)</span>
<span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">),</span><span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)</span>
</pre>
<p>
Other numerical operators can be used like this
</p>
<pre class="programlisting"><span class="identifier">multiplies</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span><span class="identifier">arg2</span><span class="special">)(</span><span class="number">3</span><span class="special">,</span><span class="number">6</span><span class="special">)</span>
<span class="identifier">divides</span><span class="special">(</span><span class="identifier">arg2</span><span class="special">,</span><span class="identifier">arg1</span><span class="special">)(</span><span class="number">3</span><span class="special">,</span><span class="number">6</span><span class="special">)</span>
<span class="identifier">modulus</span><span class="special">(</span><span class="identifier">arg2</span><span class="special">,</span><span class="identifier">arg1</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span><span class="number">6</span><span class="special">)</span>
<span class="identifier">min</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span><span class="identifier">arg2</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span><span class="number">6</span><span class="special">)</span>
<span class="identifier">max</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span><span class="identifier">arg2</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span><span class="number">6</span><span class="special">)</span>
<span class="identifier">inc</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span>
<span class="identifier">dec</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span>
<span class="identifier">negate</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span>
</pre>
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