# Rnd Function

Returns a random number.

```
Rnd[(number)]
```

## Remarks

The number argument can be any valid numeric expression.

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.

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.