Why does System.Random always return the same number?

Question

Using System.Random the below always returns 0. I need a random number between 0 and 1. It always returns 0 I would expect some distribution O's and 1's. Thanks

Random random = new Random(); int randomInt = random.Next(0, 1)

"I need a random number between 0 and 1" - Then why capture the result in an int ? — Henk Holterman
– Henk Holterman, Commented Dec 8, 2010 at 11:06

basti · Accepted Answer · 2010-12-08 11:05:51Z

5

Try

Random random = new Random(); int randomInt = random.Next(0, 2)

The Max-Value will not be reached...

answered Dec 8, 2010 at 11:05

basti

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Comments

Colin Mackay · Accepted Answer · 2010-12-08 11:04:17Z

See the documentation for this method: http://msdn.microsoft.com/en-us/library/2dx6wyd4.aspx

The number range returned will be from zero to zero. Greater or equal to the first value and less than the second value.

MatthiasG · Accepted Answer · 2010-12-08 11:03:43Z

2

The upper bound is exclusive and won't be reached.

answered Dec 8, 2010 at 11:03

MatthiasG

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Cheng Chen · Accepted Answer · 2010-12-08 11:04:27Z

2

Random.Next will return an int, that's why you always get 0. Use Random.NextDouble instead.

answered Dec 8, 2010 at 11:04

Cheng Chen

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Pabuc · Accepted Answer · 2010-12-08 11:04:33Z

0

try random.NextDouble(). There is no int between 0 and 1.

answered Dec 8, 2010 at 11:04

Pabuc

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