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Rnd Function

office 365 dev account|Last Updated: 6/12/2017
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Returns a Single containing a random number. SyntaxRnd [ (number) ] The optional numberargument is aSingle or any validnumeric expression. Return Values

If number isRnd generates
Less than zeroThe same number every time, using number as theseed.
Greater than zeroThe next random number in the sequence.
Equal to zeroThe most recently generated number.
Not suppliedThe 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.


This example uses the Rnd function to generate a random integer value from 1 to 6.

Dim MyValue
MyValue = Int((6 * Rnd) + 1)    ' Generate random value between 1 and 6.
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