lammps/doc/print.txt

"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c

:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)

:line

print command :h3

[Syntax:]

print str1 str2 ... :pre

str1,str2,...,strN = one or more text strings to print, which may contain variables :ul

[Examples:]

print Done with equilibration
print The system volume is now $v
print "The system volume is now $v" :pre

[Description:]

Print one or more text strings to the screen and logfile.  The
individual text strings are effectively concatenated into a single
string, and one line of output is generated.  Thus the 2nd and 3rd
examples above are equivalent.  If variables are included in any of
the strings, they will be evaluated and their current values printed.

If you want the print command to be executed multiple times (with
changing variable values), there are 3 options.  First, consider using
the "fix print"_fix_print.html command, which will print a string
periodically during a simulation.  Second, the print command can be
used as an argument to the {every} option of the "run"_run.html
command.  Third, the print command could appear in a section of the
input script that is looped over (see the "jump"_jump.html and
"next"_next.html commands).

See the "variable"_variable.html command for a description of {equal}
style variables which are typically the most useful ones to use with
the print command.  Equal-style variables can calculate formulas
involving mathematical operations, atom properties, group properties,
thermodynamic properties, global values calculated by a
"compute"_compute.html or "fix"_fix.html, or references to other
"variables"_variable.html.

[Restrictions:] none

[Related commands:]

"fix print"_fix_print.html, "variable"_variable.html

[Default:] none