PHP program to print Triangle number in reverse pattern

By Vikas Kumar Last updated Dec 27, 2018 17

1. Program to print Triangle number in reverse pattern

<?php
for($i=6;$i>=1;$i--)
 {
   for($j=$i;$j>=1;$j--)
    {
     echo $j." ";
     if($j==1)
     {
       echo " ";
       echo "<br />";
     }
   }
} 
?>

Output:

6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1

2. Program to print Triangle number in reverse pattern

<?php 
for($i=1;$i<=6;$i++)
{
for($j=$i;$j>=1;$j--)
 { echo $j." ";
   if($j==1)
     {
       echo " ";
       echo "<br />";
     }
  }
 } 
?>

Output:

1 
2 1 
3 2 1 
4 3 2 1 
5 4 3 2 1 
6 5 4 3 2 1

Pattern

Vikas Kumar

Founder of The Code Developer, Blogger, Web Developer, Thinker and love to write code.

17 Comments

Tanvi Parekh says 6 years ago

33333
6666
999
1212
15

give this pattern.

Reply
1. Full Stack developer says 6 years ago
  Hello Tanvi Parekh,
  
  Please try this code:
```
<?php
$num = 3;
for ($i = 1; $i <= 6; $i++) {
    for ($j = 6 - $i; $j >= 1; $j--) {
        echo $i * $num . " ";
    }
    echo "<br>";
}
?> 
```
  Reply

vishal says 6 years ago

Hello sir,
1 2 3 4
8 7 6 5
9 10 11 12
16 15 14 13

give me this pattern ans.

Full Stack developer says 6 years ago

Hello Vishal,

Try this code –

$k = 1;
for ($i = 1; $i <= 4; $i++) {
  if ($i % 2 == 0) { // check here row start with even number
        $h = 4 * $i;
        for ($j = 1; $j <= 4; $j++) {
            echo $h.' ';
            $h--;
            $k++;
        }
        echo "<br>";
    } else {
        for ($j = 1; $j <= 4; $j++) {
            echo $k.' ';
            $k++;
        }
        echo "<br>";
    }
}

siva says 5 years ago

hello sir
6,1,1,1,1,1
2,4,2,2,2,2
1,1,6,1,1,1
2,2,2,4,2,2
1,1,1,1,6,1
2,2,2,2,2,4
give me this pattern ans.

siva says 5 years ago

<?php
for ($i = 1; $i<= 6; $i++) {
    for ($j = 1; $j<= 6; $j++) {
        if($i%2 == 0){
            if($i == $j){
                echo "4";
            } else {
                echo "2";
            }
        } else {
            if($i == $j){
                echo "6";
            } else {
                echo "1";
            }

        }
    }
    echo "<br>";
}
?>

Vikas Kumar says 5 years ago

Dear Siva,
Thank you so much for the useful solution.

Reply

murshid says 5 years ago

1
2 6
3 7 10
4 8 11 13
5 9 12 14

murshid says 5 years ago

give php code it.please help

Vikas Kumar says 5 years ago

Try this code –

<?php
$n = 5;
for ($i = 1; $i <= $n; $i++) {
    $diff  = $n - 1;
    $value = $i;
    for ($j = 1; $j <= $i; $j++) {
        echo $value . " ";
        $value = $value + $diff;
        $diff--;
    }
    echo "<br />";
}
?>

Saranya E R says 5 years ago

A
C D
G H I
M N O P
U V W X Y

can you explain the PHP code for this pattern and hw it works?

Vikas Kumar says 5 years ago

Try this code –

<?php
$num = 65;
for ($i = 0; $i < 5; $i++) {
    $k = 1;
    for ($j = 0; $j <= $i; $j++) {
        
        if ($k == 1) {
            $num = $num + $i;
        }
        $ch = chr($num);
        echo $ch . " ";
        $num = $num + 1;
        $k++;
    }
    echo "<br />";
}
?>

Saranya ER says 5 years ago

Thanku so much…😊

Reply
1. Vikas Kumar says 5 years ago
  
  You’re welcome. Happing Coding.
  
  Reply
Kjmak says 4 years ago

1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
Plz sir give me answer in php

Reply
jaykumar patel says 4 years ago

write a program in php sir
1 5 9
2 6 10
3 7 11
4 8 12

Reply
yash darji says 3 years ago

Give me this patten answer. Sir help plss

5
4 5
3 4 5
2 3 4 5
1 2 3 4 5

Reply

PHP program to print Triangle number in reverse pattern

1. Program to print Triangle number in reverse pattern

Output:

2. Program to print Triangle number in reverse pattern

Output:

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