Number Triangle

Number triangle in PHP can be printed using for and foreach loop. There are a lot of patterns in number triangle. Some of them are show here.

Pattern1

<?php
$k=1;
for($i=0;$i<4;$i++){
for($j=0;$j<=$i;$j++){
echo $k." ";
$k++;
}
echo "<br>";
}
?>

Output:

Pattern 2

<?php
$k=1;
for($i=0;$i<5;$i++){
for($j=0;$j<=$i;$j++){
if($j%2==0)
{
$k=0;
}
else 
{
$k=1;
}
echo $k." ";
}
echo "<br>";
}
?>

Output:

Pattern 3

<?php
for($i=0;$i<=5;$i++){
for($j=1;$j<=$i;$j++){
echo $j;
}
echo "<br>";
}
?>

Output:

Pattern 4

<?php
for($i=0;$i>=5;$i++){
for($j=1;$j>=$i;$j++){
echo $i;
}
echo "<br>";
}
?<

Output:

Pattern 5

<?php
for($i=0;$i<=5;$i++){
for($j=1;$j<=$i;$j++){
echo "1";
}
echo "<br>";
} 
?>

Output:

Pattern 6

<?php
for($i=0;$i<=5;$i++){
for($j=5-$i;$j>=1;$j--){
echo "1";
}
echo "<br>";
}
?>

Output:

Pattern 7

<?php
for($i=0;$i<=5;$i++){
for($j=5-$i;$j>=1;$j--){
echo $j;
}
echo "<br>";
}
?>

Output:

Pattern 8

<?php
for($i=5;$i>=1;$i--){
for($j=$i;$j>=1;$j--){
echo $i."�";
}
echo "<br>";
}
?>

Output:

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