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Excel RAND Function

Excel RAND function
The Excel RAND function returns a random number between 0 and 1. For example, =RAND() will generate a number like 0.422245717. RAND recalculates when a worksheet is opened or changed.
Get a random number between 0 and 1
Return value 
A number between 1 and 0
=RAND ()
Usage notes 
  • RAND calculates a new value each time the worksheet is calculated. To stop random numbers from being updated, copy the cells that contain RAND to the clipboard, then use Paste Special > Values to convert to text.
  • To get a random number that doesn't change when the worksheet is calculated, enter =RAND() in the formulas bar and then press F9 to convert the formula into its result.
  • To generate a set of random numbers in multiple cells, select the cells, enter RAND() and press control + enter.
  • To generate a random number between a and b, use this formula: RAND() * (b - a) + a

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