﻿ PHP: Check whether a given number is an ugly number - w3resource

# PHP Challenges: Check whether a given number is an ugly number

## PHP Challenges - 1: Exercise-19 with Solution

Write a PHP program to check whether a given number is an ugly number.

Input : 12

Ugly numbers are positive numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, ...
shows the first 10 ugly numbers.
Note: 1 is typically treated as an ugly number.

Explanation :

Sample Solution :

PHP Code :

``````<?php
function is_ugly(\$num)
{
\$z = \$num;
if (\$num == 0)
{
return "\$num is not an Ugly number";
}

\$x = array(2, 3, 5);
foreach (\$x as \$i)
{
while (\$num % \$i == 0)
{
\$num /= \$i;
}
}
if (\$num==1)
{
return "\$z is an Ugly number";
}
else
{
return "\$z is not an Ugly number";
}

}

print(is_ugly(12)."\n");
print(is_ugly(7)."\n");
?>
```
```

Sample Output:

```12 is an Ugly number
7 is not an Ugly number
```

Flowchart:

PHP Code Editor:

```<?php
function is_ugly(\$num)
{
\$z = \$num;
if (\$num == 0)
{
return "\$num is not an Ugly number";
}

\$x = array(2, 3, 5);
foreach (\$x as \$i)
{
while (\$num % \$i == 0)
{
\$num /= \$i;
}
}
if (\$num==1)
{
return "\$z is an Ugly number";
}
else
{
return "\$z is not an Ugly number";
}

}

print(is_ugly(12)."\n");
print(is_ugly(7)."\n");
?>
```

Improve this sample solution and post your code through Disqus