converting int to float/double

Question

I am running into troubles when I want to convert integer values to float (numbers with dots).

$a = 7200;
$b = $a/3600;

echo $b; // 2

$b = floatval($b);

echo $b; // 2

But it should echo 2.0 or 2.00

I also tried settype, without success. And I am finding only help/solutions/questions for "float to int".

2 and 2.0 are the same number float or not. I understand that you are not seeing the decimal as you like, but the math you are doing is coming up with an int for a quotient. Do you experience the same when dividing by floating point numbers? — Crackertastic, Oct 16 '13 at 17:15

Tamil Selvan C · Accepted Answer · 2017-02-18T03:20:52.310

38

Updated:

Use

echo sprintf("%.2f", $b); // returns 2.00

~~Use~~

echo number_format($b, 2);

eg:

echo number_format(1234, 2); // returns 1,234.00

Edit:

@DavidBaucum Yes, number_format() returns string.

Use

echo sprintf("%.2f", $b);

For your question, use

Why number_format doesn't work can be demonstrated by this. echo number_format(1234,0) + 1.0 The result is 2

echo sprintf("%.2f",(1234 + 1.0 ) ); // returns 1235.00

edited Feb 18 '17 at 03:20

answered Oct 16 '13 at 17:16

Tamil Selvan C

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number_format returns a string, never a float. – David Baucum Feb 17 '17 at 20:24
1

Why `number_format` doesn't work can be demonstrated by this. `echo number_format(1234,0) + 1.0` The result is `2`. – David Baucum Feb 17 '17 at 21:03
@DavidBaucum I updated my answer and thanks for pointing my mistake :) – Tamil Selvan C Feb 18 '17 at 03:23
1

But `sprintf` returns `string` as well! – Kostiantyn Feb 02 '19 at 00:25
why everyone answers with output? What if I wanted to format a variable? – Dec 16 '20 at 07:40

score 11 · Answer 2 · answered Oct 16 '13 at 17:15

You can use number_format() function to accomplish this. This function also allows you to define the number of zeroes to be displayed after the decimal -- you just need to use the second parameter for that:

$a = 7200;
$b = $a/3600;
$b = floatval($b);
echo number_format($b, 2, '.', '');

Or, if you want to do it one line:

echo number_format( (float) $b, 2, '.', '');

Output:

2.00

Demo!

score 9 · Answer 3 · answered Oct 16 '13 at 17:15

9

Something like:

<?php
    $a = 7200;
    $b = $a/3600;

    $b = number_format($b,2);

    echo $b; // 2.00
?>

-

number_format(number,decimals,decimalpoint,separator)

answered Oct 16 '13 at 17:15

Blazer

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score 3 · Answer 4 · answered Oct 16 '13 at 17:15

3

I found a solution by myself:

    $b = number_format((float)$b, 1, '.', '');
echo $b; // 2.0

does the trick

answered Oct 16 '13 at 17:15

Mike

3,200
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1

After So many google searches, This helped !!! Thanks Buddy – Khn Rzk Feb 07 '22 at 05:57

converting int to float/double

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