PHP Note III: Use of loops (loop output table)

There are three types of cycles:
1. For loop
Format:

    For (initialization of the loop variable; loop condition; increment of the loop variable) {loop body}

2. While loop
Format:

   while (condition) {       loop body   }

3. Do While loop
Format:

   Do {      loop body   } while (condition);
Note: The semicolon after the while statement

Attention:
1), for loop for a regular cycle, with more
2), while and does while are different:
The while loop may not execute at one time, while the Do While loop executes at least once

Example:

<?PHP/** loop out a table, using for loop, while loop, do While loop, respectively*/  //For loop//Output table header    Echo"<table width= ' 80% ' align= ' center ' border=1 cellpadding=5 clellspacing=0> '; //output of the outer loop control row     for($i= 1;$i<=5;$i++) {         //Interlaced color Change        if($i% 2 ==0){            Echo("<tr align= ' center ' bgcolor= ' green ' >"); }Else{            Echo("<tr align= ' center ' >"); }                //the output of the Inner loop control column         for($j= 1;$j<=8;$j++) {             Echo"<td>".$i*$j." </td> "; }        Echo"</tr>"; }    Echo"</table>"; //While Loop    Echo"<table width= ' 80% ' align= ' center ' border=1 cellpadding=5 clellspacing=0> '; $m= 1;  while($m<= 5) {        //Interlaced color Change        if($m% 2 ==0){            Echo("<tr align= ' center ' bgcolor= ' green ' >"); }Else{            Echo("<tr align= ' center ' >"); }                //the output of the Inner loop control column        $n= 1;  while($n<= 8) {             Echo"<td>".$m*$n." </td> "; $n++; }        Echo"</tr>"; $m++; }    //Do and Loop    Echo"<table width= ' 80% ' align= ' center ' border=1 cellpadding=5 clellspacing=0> '; $k= 1;  Do{        //Interlaced color Change        if($k% 2 ==0){            Echo("<tr align= ' center ' bgcolor= ' green ' >"); }Else{            Echo("<tr align= ' center ' >"); }                //the output of the Inner loop control column        $p= 1;  Do {             Echo"<td>".$k*$p." </td> "; $p++; } while($p<= 8); Echo"</tr>"; $k++; } while($k<= 5);?>

PHP Note III: Use of loops (loop output table)