PHP implementation of the 99 multiplication table concise version, PHP implementation multiplication Formula _php tutorial

PHP implementation of the 99 multiplication table concise version, PHP implementation multiplication formula

99 multiplication table is also a lot of interview test of the program, to examine the logical thinking ability of the PHP interviewer, mainly is the understanding and application of the algorithm, the following is a small series of PHP write output 99 multiplication formula PHP code:

<?phpfor ($i =1; $i <=9; $i + +) {for ($j =1; $j <= $i; $j + +) {echo "$i * $j =". $i * $j. ';} Echo '
';}? >

After watching, is not very simple, that is, two loops, the outer control loop number of rows, the inner layer controls the number of formulas entered in each row.

Output Result:

How to do 99 multiplication tables with PHP

The following program Debugs pass to ensure that the operation is correct:

for ($i =1; $i <=9; $i + +) {
for ($j =1; $j <= $i; $j + +) echo "$i * $j =". $i * $j. " ";
echo "
\ n ";
}
?>

The results of the operation are as follows:
1*1=1
2*1=2 2*2=4
3*1=3 3*2=6 3*3=9
4*1=4 4*2=8 4*3=12 4*4=16
5*1=5 5*2=10 5*3=15 5*4=20 5*5=25
6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36
7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49
8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

PHP 99 multiplication Table How to write

This is simple, you can refer to the For loop plus while loop.
echo "Multiplication table", "</br>";
for ($j =1; $j <=9; $j + +) {
$z = 1;
while ($z <= $j) {
echo $z. " * ". $j." = ". $z * $j," ";
$z + +;
}
echo "</br>";
}
?>

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