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InsideQC Forums • View topic - Question about random()

Question about random()

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Question about random()

Postby Orion » Mon Sep 24, 2012 12:41 am

Does random() only return 10 different random numbers, between 0 and 1?
I've tested it with ftos() and it only gave me 0.1, 0.4, 0.7 etc...
I dunno if ftos() round things up a little, but can random() return something like 0.15? 0.00001, etc?
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Re: Question about random()

Postby taniwha » Mon Sep 24, 2012 5:29 am

It's ftos. The original code used %5.1f for the format. Try multiplying the result by some scale (eg, 1000).
Leave others their otherness.
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Re: Question about random()

Postby Spike » Mon Sep 24, 2012 4:00 pm

If using DP, you can use the sprintf builtin to view the number more fully. eg:
bprint(sprintf("random number is %f\n", random()));

This allows you to use your own precision etc.
Hint: try %g for a terse but accurate representation of a float.

Different engines can use different precision in ftos. Particuarly with nq vs qw.
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