CODEWITHSUNDEEP
phprandom
Ing. Michal Hudak
Ing. Michal Hudak

Reputation: 5612

PHP random decimal between two decimals with step 0.5

I want to create random number between two decimal numbers with step 0.5.

Examples: 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, ...

Use PHP To Generate Random Decimal Beteween Two Decimals

So far I can generate numbers between 0 and 5 with one decimal comma.

How to integrate step 0.5?

$min = 0;
$max = 5;
$number = mt_rand ($min * 10, $max * 10) / 10;

Upvotes: 10

Views: 5871

Answers (3)

Valentine Shi
Valentine Shi

Reputation: 7800

More intuitive, less unnecessary actions:

$min = 0;
$max = 5;
$step = 0.5;
// Simple for the case above.
echo $number = mt_rand($min * 2, $max * 2) * $step;

More general, a bit sophisticated case

echo $number = mt_rand(floor($min / $step), floor($max / $step)) * $step;

mt_rand offical docs just in case.

Upvotes: 1

Raisch
Raisch

Reputation: 821

Another possible way:

function decimalRand($iMin, $iMax, $fSteps = 0.5)
{
    $a = range($iMin, $iMax, $fSteps);

    return $a[mt_rand(0, count($a)-1)];
}

Upvotes: 1

Rizier123
Rizier123

Reputation: 59681

This should work for you:

$min = 0;
$max = 5;
echo $number = mt_rand($min * 2, $max * 2) / 2;

Upvotes: 10

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