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Posted by julian_m on 03/17/06 22:02
I need to calculate the sum of the following numbers
1+ 11 + 111 + 1111 + ......+ 1111.....11111 (the last one is a number
made by 2002 1's )
so, I wrote
$res =0;
for ($i = 1; $i<2003; $i++){
echo str_repeat("1", $i).'<br>';
$res += str_repeat("1", $i);
}
echo 'El resultado total es:<br>';
echo $res;
All works pretty well, and after a really small piece of time, I get:
1.2345679012346E+308
but the result seems to be wrong, beacause I do know (given that I have
a math proof), that it should have 224 1's inside, and as fas as I
know,
1.2345679012346E+308 means 1.2345679012346 * 10^308
which obviously doesn't have such amount of 1's (in fact only has 2 )
Can anyone point me where is the mistake?
sdos - jm
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