xampi Posted October 27, 2020 Share Posted October 27, 2020 So I want to create a table with php and html that outputs a 10x10 table with numbers from 0 to 99 and differentiating prime numbers: The problem is that every time it checks prime numbers from 0 to 99 it prints it in every '<tr>'. Ty in advance for the help! It outputs a check of primer numbers from 0 to 99 every tr and i want it to be a single check from 0 to 99 using 10 tr <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> </head> <body> <?php echo "<table>"; for($i=0; $i < 10; $i++){ echo "<tr>"; for($x=0; $x < 10; $x++){ for($i=0;$i<=99;$i++){ $counter = 0; for($j=1;$j<=$i;$j++){ if($i % $j==0){ $counter++; } } if($counter==2){ echo "<td style="background-color: yellow;">".$i."</td>"; }else{ echo "<td style="background-color: blue>".$i."</td>"; } } echo "</tr>"; } } echo "</table>"; ?> </body> </html> Quote Link to comment Share on other sites More sharing options...
Barand Posted October 27, 2020 Share Posted October 27, 2020 (edited) Hints Put the numbers 0 - 99 in an array and use array_chunk() to get the rows. Loop through each chunk to get the cells in each row. when checking for N is prime, it is necessary only to check for factors <= sqrt(N) Edited October 27, 2020 by Barand Quote Link to comment Share on other sites More sharing options...
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