Time span in days (decimal)

[ssimop]

I wonder whether there exists a function to find the difference between two time-stamps. At present I use :

Macro temp10

Code:

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DateTime xde xsa xan
xan.FromStr("13-07-08 12:00:10")
xsa.FromStr("10-07-08")
xde=xan    -xsa
double ddiff=xde
ddiff=ddiff/10000000/60/60/24 ;; days
out F"Decay in days: {ddiff%%12.5f}"

I have tried also TimeSpanGetPartsTotal(long'xde long'ddays)

but I failed to convert long'ddays to a double variable.

Any advice is much appreciated.