How to add two large fractions in PHP [duplicate]

Question

I want to add following numbers

$res = 0.000000002 + 0.000000002 + 0.000000002;

I got result like this

4.2E-8

can any one explain , how to get 0.000000006

thanks

If you want 0.000000006 as result, you should get 6.0E-9. 4.2E-8 means 0.000000042 — dev-null-dweller
– dev-null-dweller, Commented Jun 22, 2013 at 9:21
I used printf( 0.000000002 + 0.000000002 + 0.000000002); result is same, i want to show exact result like 0.000000006 — dewshare
– dewshare, Commented Jun 22, 2013 at 9:24
You shouldn't have got the same result if you used printf( 0.000000002 + 0.000000002 + 0.000000002);; if anything, you should have got a warning.... printf() requires a format mask as the first argument — Mark Baker
– Mark Baker, Commented Jun 22, 2013 at 9:35

Karoly Horvath · Accepted Answer · 2013-06-22 09:24:29Z

You should get the following result:

echo 0.000000002 + 0.000000002 + 0.000000002; 6.0E-9

Which means you haven't told us the truth.

One way to get 4.2E-8 is to add 0.00000002 + 0.00000002 + 0.000000002; (I removed a zero from two of them).

Swapnil · Accepted Answer · 2013-06-22 09:25:28Z

2

//Try using echo number_format($res,10);

answered Jun 22, 2013 at 9:25

Swapnil

6064 silver badges13 bronze badges

Comments

Baba · Accepted Answer · 2013-06-22 09:25:47Z

Try

$res = 0.000000002 + 0.000000002 + 0.000000002; printf("%0.9f",$res);

or

print(number_format($res,9));

Output

0.000000006

Hardik Patel · Accepted Answer · 2013-06-22 09:38:54Z

0

Please try this .

$res = 0.000000002 + 0.000000002 + 0.000000002; echo number_format($res, 9, '.', '');die;

here 9 no is describe after dot how many digit you want to show.

answered Jun 22, 2013 at 9:38

Hardik Patel

7166 silver badges15 bronze badges

1 Comment

dewshare Over a year ago

your code is correct ! but value 9 does not remain the same all time, is any way to replace number 9 to a variable

rene · Accepted Answer · 2014-02-11 21:22:51Z

$res = 0.0000000002 + 0.0000000002 + 0.0000000002; echo exp2dec($res); function exp2dec($number) { preg_match('/(.*)E-(.*)/', str_replace(".", "", $number), $matches); $num = "0."; while ($matches[2] > 0) { $num .= "0"; $matches[2]--; } return $num . $matches[1]; } die;

Please try this.

Collectives™ on Stack Overflow

How to add two large fractions in PHP [duplicate]

5 Answers 5

1 Comment

Comments

Comments

1 Comment

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

1 Comment

Comments

Comments

1 Comment

Comments

Linked

Related