This help topic is for R version 2.9.0. For the current version of R, try https://stat.ethz.ch/R-manual/R-patched/library/utils/html/flush.console.html
flush.console {utils}R Documentation

Flush Output to A Console

Description

This does nothing except on console-based versions of R. On the Mac OS X and Windows GUIs, it ensures that the display of output in the console is current, even if output buffering is on.

Usage

flush.console()

[Package utils version 2.9.0 ]