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<?php //php program to find lcm and hcf of 2 numbers using while loop $a=5; $b=10; $c=$a*$b; while($a!=$b) { if($a>$b) $a=$a-$b; else $b=$b-$a; } print('HCF = ' . $a); print('<br>'); print('LCM = ' . $c/$a); ?>