Sys.time
and Sys.Date
returns the system's idea of the
current date with and without time.
Sys.time()
Sys.Date()
Sys.time
returns an absolute date-time value which can be
converted to various time zones and may return different days. Sys.Date
returns the current day in the current time zone.
date
for the system time in a fixed-format character
string. Sys.timezone
.
system.time
for measuring elapsed/CPU time of expressions.