How to catch Error Messages in R

As we knew, if a function is not used correctly,
an error message will throw/display in R:
rnorm(-1)
Error in rnorm(-1) : invalid arguments

I would like to catch the error message or assign an error message to a
variable so that I can use them some where else.
So, how to catch error messages in R? Thanks,

-james
?try
As we knew, if a function is not used correctly,
an error message will throw/display in R:

rnorm(-1)
Error in rnorm(-1) : invalid arguments

I would like to catch the error message or assign an error message to a
variable so that I can use them some where else.
So, how to catch error messages in R? Thanks,

-james

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