<p>Note that if one of the commands to execute is <aclass="reference internal"href="quit.html"><spanclass="doc">quit</span></a>, as in
the first example above, then executing the command will cause LAMMPS
to halt.</p>
<p>Note that by jumping to a label in the same input script, the if
command can be used to break out of a loop. See the <aclass="reference internal"href="variable.html"><spanclass="doc">variable delete</span></a> command for info on how to delete the associated
loop variable, so that it can be re-used later in the input script.</p>
<p>Here is an example of a loop which checks every 1000 steps if the
system temperature has reached a certain value, and if so, breaks out
of the loop to finish the run. Note that any variable could be
checked, so long as it is current on the timestep when the run
completes. As explained on the <aclass="reference internal"href="variable.html"><spanclass="doc">variable</span></a> doc page,
this can be insured by includig the variable in thermodynamic output.</p>
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