Question

How to find all the armstrong numbers in the range of 0 and 999 in PHP

Answer 1

// An Armstrong number of three digits is an integer that the sum 
// of the cubes of its digits is equal to the number itself
   
// 371 is an Armstrong number: 3**3 + 7**3 + 1**3 = 371
   
for ($n = 0; $n <= 999; $n++) 
{
    $tmp = $n;
    $sum = 0;
           
    while ($tmp != 0)
    {
        $reminder = $tmp % 10;
        $tmp = (int)($tmp / 10);
        $sum = $sum + ($reminder * $reminder * $reminder);
    }
    if ($sum == $n)
        echo $n . "<br />";
}
 
/*
run:
  
0
1
153
370
371
407
   
*/

 

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