RosettaCodeData/Task/Feigenbaum-constant-calculation/Phix/feigenbaum-constant-calculation.phix

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 <span style="color: #008080;">constant</span> <span style="color: #000000;">maxIt</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">13</span><span style="color: #0000FF;">,</span>
         <span style="color: #000000;">maxItJ</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">10</span>
 <span style="color: #004080;">atom</span> <span style="color: #000000;">a1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1.0</span><span style="color: #0000FF;">,</span>
      <span style="color: #000000;">a2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0.0</span><span style="color: #0000FF;">,</span>
      <span style="color: #000000;">d1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">3.2</span>
 <span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" i d\n"</span><span style="color: #0000FF;">)</span>
 <span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">2</span> <span style="color: #008080;">to</span> <span style="color: #000000;">maxIt</span> <span style="color: #008080;">do</span>
      <span style="color: #004080;">atom</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a1</span> <span style="color: #0000FF;">+</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">a1</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">a2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">/</span> <span style="color: #000000;">d1</span>
      <span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">maxItJ</span> <span style="color: #008080;">do</span>
           <span style="color: #004080;">atom</span> <span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
           <span style="color: #008080;">for</span> <span style="color: #000000;">k</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">power</span><span style="color: #0000FF;">(</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
                <span style="color: #000000;">y</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">2</span><span style="color: #0000FF;">*</span><span style="color: #000000;">y</span><span style="color: #0000FF;">*</span><span style="color: #000000;">x</span>
                <span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">*</span><span style="color: #000000;">x</span>
           <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
           <span style="color: #000000;">a</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">/</span><span style="color: #000000;">y</span>
      <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
      <span style="color: #004080;">atom</span> <span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">a1</span><span style="color: #0000FF;">-</span><span style="color: #000000;">a2</span><span style="color: #0000FF;">)/(</span><span style="color: #000000;">a</span><span style="color: #0000FF;">-</span><span style="color: #000000;">a1</span><span style="color: #0000FF;">)</span>
      <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%2d %.8f\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">})</span>
      <span style="color: #000000;">d1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">d</span>
      <span style="color: #000000;">a2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a1</span>
      <span style="color: #000000;">a1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
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