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VBScript Rnd Function

VBScript Reference Complete VBScript Reference

The Rnd function returns a random number. The number is always less than 1 but greater or equal to 0.

Syntax

Rnd[(number)]

Parameter Description
number Optional. A valid numeric expression

If number is:

  • <0 - Rnd returns the same number every time
  • >0 - Rnd returns the next random number in the sequence
  • =0 - Rnd returns the most recently generated number
  • Not supplied - Rnd returns the next random number in the sequence

Examples

Example 1

A random number:

<script type="text/vbscript">

document.write(Rnd)

</script>

Note that you will get the same number every time. To avoid this, use the Randomize statement like in Example 2

The output of the code above will be:

0.7055475

Try it yourself »

Example 2

To avoid getting the same number every time, like in Example 1, use the Randomize statement:

<script type="text/vbscript">

Randomize
document.write(Rnd)

</script>

The output of the code above will be:

0.4758112

Try it yourself »

Example 3

Here is how to produce random integers in a given range:

<script type="text/vbscript">

Dim max,min
max=100
min=1
Randomize
document.write(Int((max-min+1)*Rnd+min))

</script>

The output of the code above will be:

71

Try it yourself »
VBScript Reference Complete VBScript Reference

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