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Source code for: challenge1_4.php

<html>

<head>

 <title>Q7310 Challenge1.4 Using CONDITIONALS & FOR Loops </title>

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<h1 align="center">

Program #4: FOR Loops 

</h1>



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<FONT face="arial, helvetica, sans-serif" size=2 color="ececec">



<TABLE width="90%" border=1 cellpadding=10 cellspacing=0>

<TR>

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<?php



// INITIALIZE THE ARRAY, $testing

$testing = array(

         "Program 1.4: ", 

"<br>", 

" Sums and multiplies all the odd numbers from 1 to 1000, inclusive; ",

"uses only ONE loop; ",

"and displays ALL addition calculations and ONLY multiplication up to Infinity."

         ); 





// SET THE MAXIMUM TIMES TO REPEAT: $times

// INITIALIZE THE ARRAY INDEX at 0 (element #1)



$times = count($testing);





// FOR LOOPING

FOR ($x=0; $x < $times; ++$x) {

print $testing[$x];



}

// ====================================================================

?>





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</TR>





<TR>

  <TD>



<?php

// INITIALIZE VALUES



$Tprevious=0;

$Mprevious=1;

$total=0;

$Mtotal=0;

$Mflag=0;

// ERROR PROCESSING FOR $MTOTAL=INFINITY

settype($overflow, 'double');

$overflow = 3.7532741115719E+306 * 301; //Infinity 



/* DEBUG 

print "<h1> $overflow "; print gettype($overflow); echo "</h1>";

*/



// SETUP HTML TABLE



echo "<TABLE width=90% border=1 align=center>";



    echo "<TR>";



    echo "<TD width=20% align=center>";

    echo "<FONT color='gold'> <b> ODD NUMBER </b> </FONT>";

    echo "</TD>"; 

    echo "<TD width=30% align=center>"; 

    echo "<FONT color='gold'> <b> Cumulative ADDITION </b> </FONT>";

    echo "</TD>";

    echo "<TD align=center>";

    echo "<FONT color='gold'> <b> Cumulative MULTIPLICATION </b> </FONT>";

    echo "</TD>";

    echo "</TR>";



//SINGLE CALCULATION & PRINTING LOOP 

// ODD NUMBER = $counter and will increment by two



FOR ($counter=1; $counter < 1000; $counter +=2){

    echo "<TR>";

    echo "<TD align=center>";

    echo "<b>";

        print "$counter . ";

    echo "</b>";

    echo "</TD>"; 





// STOP MULTIPLYING AT INFINITY



    IF ($Mflag == 0) {

        $Mtotal = $Mprevious * $counter;

    }



    echo "<TD>"; 

         $total = $Tprevious + $counter;

        print " ($Tprevious + $counter) = $total ";

    echo "</TD>";

    echo "<TD>";



// STOP PRINTING MULTIPLICATION AT INFINITY



     IF ($Mtotal >= $overflow){        

           echo "&nbsp ";

           $Mflag=1;

     } ELSE {  



           print " ($Mprevious X $counter) = $Mtotal ";

     }



// INCREMENT RUNNING TOTALS



       $Tprevious = $total;

       $Mprevious = $Mtotal;



// NEXT TABLE ROW

    echo "</TD>";

    echo "</TR>";



}

echo "</TABLE>";

?>



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  <TD>

<?php



// PAGE FOOTER INFORMATION *****************************************



?>

   </TD>

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<TR>

<TD>

SOURCE CODE: Click

<A HREF="http://rrchubbard.org/php/q7310/source1_4.php" target="_blank">

HERE </A>

 </TD>

</TR>

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  Last Updated

<I>: 

  <!-- #BeginDate format:fcAm1m -->Thursday, September 30, 2004  10:59<!-- #EndDate -->

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<P>

  <FONT face="Arial, Helvetica, sans-serif" size="1">

(c) 2004   Robin Y. Mabry Hubbard <A href="mailto:4ascii@marz.com">4ascii@marz.com</A>

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