Table of Contents
Category: Number function
This function generates a random number between 0 and 1.
This function does not require arguments.
Return value type: Number
Generating random numbers within a given range
To generate a random number between a specific minimum and maximum value, use the following calculation (extra spaces have been added for clarity):
( random() * ( [number of values in range] - 1) ) + [minimum value]
The expression to generate a random number between 1 and 10 would be the following:
( random() * (10-1) ) +1
( random() * 9 ) +1
The expression above will provide a decimal result you will need to round for an integer result:
roundxl( ( random() * 9 ) +1 , 0 ) //Excel-style rounding
Determining the number of values in a given range
The number of values in a given range is determined as:
(max value) - (min value) + 1
This can be deceiving at first glance. For example, the range between 20 and 40 includes 21 values.
Extra spaces added for clarity.
random() //Returns 0.37130572949209748204
( random() * 10 ) +2 //Random number between 2 and 12, unrounded.
roundxl( ( random() * 20 ) +20 , 0 ) //Random number between 20 and 40, rounded to an integer.