How to get double value in php

Question

Actually, I want to add two number and the result should be in double.

<?php

    $a=4.0;
    $b=4;
    echo $a+$b
    ?>

expected output will be 8.0 but it gives result 8. I'm new to PHP.

Try this http://php.net/manual/en/function.doubleval.php – Sahil Gulati Jun 17 '17 at 18:08 — Sahil Gulati, Jun 17 '17 at 18:08
Already tried....it's not working. – Jitendra Jun 17 '17 at 18:12 — Jitendra, Jun 17 '17 at 18:12
Use either `bc` or `gmp` functions... – l'L'l Jun 17 '17 at 18:13 — l'L'l, Jun 17 '17 at 18:13

score 1 · Accepted Answer · answered Jun 17 '17 at 18:13

Actually it's worked correctly and $a+$b is float, but because it's 8.0, showing 8. You can use number_format() function to add fixed decimal point to numbers.

<?php
    $a=4.0;
    $b=4;
    echo $a+$b// Ouput: 8
    var_dump($a+$b); //Output: float(8)
    echo number_format($a+$b, 1); //echo with one decimal: 8.0
?>

You can test it with other numbers:

<?php
    $a=4.1;
    $b=4;
    echo $a+$b// Ouput: 8.1
    var_dump($a+$b); //Output: float(8.1)
    echo number_format($a+$b, 1); //echo with one decimal: 8.1
?>

Is any other way to bring 8.0, i mean without using number format? — manny, Apr 24 '19 at 07:36

score 0 · Answer 2 · edited Jun 18 '17 at 21:50

0

Try this

<?php
    $a=4.0;
    $b=4;
    echo sprintf("%.2f", $a+$b);
?>

edited Jun 18 '17 at 21:50

answered Jun 17 '17 at 18:12

Neeraj Kumar

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`echo sprintf()` is an "antipattern". There is absolutely no reason that anyone should ever write `echo sprintf()` -- it should be `printf()` without `echo` every time. – mickmackusa Apr 16 '22 at 02:40

How to get double value in php

2 Answers2