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Unexpected behaviour in generating random number

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Apr 08.2008

I need to generate the phone number with starting digit 98.I use the below expression
98+”+Math.floor(Math.random()*100000000)

This generate 10 digit number .But sometimes it generate 9 digit .How to fix that problem

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JavaScript

2 Comments(s) ↴

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@KorApr 08.2008 — I guees you should round to ceil and use 99999999 as limit. Try:
<i>
</i>Math.ceil(Math.random()*99999999)
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@mrhooApr 08.2008 — It is possible to return a random number with a leading .0-

or even several zeroes before a digit.

It won't come up often, but once is probably too many.

To be absolutely sure your phone number will have 10 digits,

you better check it-


var s='98';

while(s.length!=10)s=98+''+Math.floor(Math.random()*1e8);
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