Description
Returns a random number.
Syntax
Rnd[(number)]
The number named argument can be any valid numeric expression.
Remarks
The Rnd function returns a value less than 1 but greater than or equal to 0.
The value of number determines how Rnd generates a random number:
|
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. |
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.
Use the Randomize statement without an argument to provide a random seed based on the system timer to initialize the random-number generator before Rnd is called.
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.
See Also
Randomize Statement, Timer Function.
Example
This example uses the Rnd function to generate a random integer value from 1 to 6.
MyValue = Int((6 * Rnd) + 1) ' Generate random value between 1 and 6.