Command to display without generating

[Chen Samulsion]

Dear Stata users,

Suppose I want to know the result of the sum of a variable X, in Stata I can use egen command

egen wanted =  total(X)

My question: Is there a command can display directly the result that I wanted, and without generating a new variable? For example:

display [(or any available command) (wanted = )] total(X)

Thank you very much.

[Clyde Schechter]

summarize X, meanonly
display `r(sum)'

[Chen Samulsion]

Clyde Schechter professor, thank you so much!