srand() & rand()

[Anon]

Hi, I'm trying to generate a number between 1.01 and 1.69 using this code:

srand((double)microtime()*1000000);
$randNum[] = rand(1.01, 1.69);

but all I get back is 1. I even tried using the mt_rand() functions, but still got the same thing. Anyone have any ideas?

Thanks a bunch!

[john1]

Hi

I believe that rand only generates random whole numbers and can't deal with floats..

So you might want to try:

srand((double)microtime()*1000000);
$randNum = rand(0, 69);
$randNum = "1.$randNum";

This creates a random number between 0 and 69 and then creates a new variable with "1." appended to the front of it.. as PHP just uses scalars you can still do arithmetic ops. on the variable you create this way e.g.

$randNum += 0.01;

Hope this helps

Rgds

John

[Anon]

Not quite. If randNum=1, Then randNum becomes 1.1, not 1.01

Fixed:

srand((double)microtime()*1000000);
$randNum = rand(1, 69); // 1-69
$randNum = $randNum/100; // .01-.69
$randNum = 1+$randNum; // 1.01-1.69 (YAY!)

I think that will work for you...🙂