How can we get difference between two times ?

Hi All,

I am having two times saves in 2 variables 

Eg: 1)  2/5/2023 9:00 AM GMT+05:30.  2)   2/5/2023 8:00 PM GMT+05:30

now my ask is what function we should use in order to get the output like output : 11 hrs or in minuts

and also same for dates 

Thank you 

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