rnd()所产生的随机数的范围是多少?

chen6191 2003-10-16 04:30:08
请问大家,VB中rnd()所产生的随机数的范围是多少?
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zhourongbiao 2003-10-16
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0<=Rnd()<1
easydone 2003-10-16
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区间:[0,1)

Rnd Function


Returns a Single containing a random number.

Syntax

Rnd[(number)]

The optional number argument is a Single or any valid numeric expression.

Return Values

If number is Rnd generates
Less than zero The same number every time, using number as the seed.
Greater than zero The next random number in the sequence.
Equal to zero The most recently generated number.
Not supplied The next random number in the sequence.


Remarks

The Rnd function returns a value less than 1 but greater than or equal to zero.

The value of number determines how Rnd generates a random number:

For any given initial seed, the same number sequence is generated because each successive call to the Rnd function uses the previous number as a seed for the next number in the sequence.

Before calling Rnd, use the Randomize statement without an argument to initialize the random-number generator with a seed based on the system timer.

To produce random integers in a given range, use this formula:

Int((upperbound - lowerbound + 1) * Rnd + lowerbound)

Here, upperbound is the highest number in the range, and lowerbound is the lowest number in the range.

Note To repeat sequences of random numbers, call Rnd with a negative argument immediately before using Randomize with a numeric argument. Using Randomize with the same value for number does not repeat the previous sequence.
hemeijun81 2003-10-16
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0 和 1 之间
fbmsf 2003-10-16
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不包括0,1.0
demo001 2003-10-16
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0----1
strongfisher 2003-10-16
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Rnd 函数返回小于 1 但大于或等于 0 的值

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