PHP Number Triangle Program

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:

PHP Number triangle 1

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:

PHP Number triangle 2

Pattern 3

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

Output:

PHP Number triangle 3

Pattern 4

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

Output:

PHP Number triangle 4

Pattern 5

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

Output:

PHP Number triangle 5

Pattern 6

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

Output:

PHP Number triangle 6

Pattern 7

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

Output:

PHP Number triangle 7

Pattern 8

  <?php  for($i=5;$i>=1;$i–){  for($j=$i;$j>=1;$j–){  echo $i.” “;  }  echo “<br>”;  }  ?>  

Output:

PHP Number triangle 8