Question

How to calculate generic root of a number in PHP

Answer 1

// Generic Root of a number = sum of all the digits of the number until we get a single-digit
// 12345 : 1 + 2 + 3 + 4 + 5 = 15 : 1 + 5 = 6
// Generic Root of 12345 is 6

$num = 12345;

while($num > 10) {
    $sum = 0;
    echo "sum digits of " . $num . " = ";
    while($num) {
        $remainder = $num % 10;
        $num = $num / 10;
        $sum += $remainder;
    }
    echo $sum . "\n";
    if($sum > 10)
        $num = $sum;
    else
        break;
}
echo "generic root = " . $sum;
 
 
 
 
/*
run:
    
sum digits of 12345 = 15
sum digits of 15 = 6
generic root = 6
    
*/

 

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Answer 2

// Generic Root of a number = sum of all the digits of the number until we get a single-digit
// 12345 : 1 + 2 + 3 + 4 + 5 = 15 : 1 + 5 = 6
// Generic Root of 12345 is 6

$num = 12345;

$generic_root = 1 + (($num - 1) % 9);
    
echo "generic root = " . $generic_root;
 
 
 
 
/*
run:
    
generic root = 6
    
*/

 

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Answer 3

// Generic Root of a number = sum of all the digits of the number until we get a single-digit
// 12345 : 1 + 2 + 3 + 4 + 5 = 15 : 1 + 5 = 6
// Generic Root of 12345 is 6

$num = 12345;

($generic_root = $num % 9) ? $num : 9;
    
echo "generic root = " . $generic_root;
 
 
 
 
/*
run:
    
generic root = 6
    
*/

 

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