View source for Integral

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      <td valign="top"><apll>Z←{L} f<_sg/> R</apll></td>
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      <td>returns the definite Integral of the function <apll>f</apll> between the points <apll>L</apll> and <apll>R</apll>.</td>
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  <td><apll>L</apll> is an optional numeric singleton which represents the lower bound of the definite Integral.  If it is omitted, <apll>0</apll> is used.</td>
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  <td><apll>R</apll> is a numeric singleton which represents the upper bound of the definite Integral.</td>
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  <td><apll>f</apll> is an arbitrary monadic function.</td>
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==Introduction==