diff --git a/doc/if.html b/doc/if.html
index f0b5167c5..f0c7af78d 100644
--- a/doc/if.html
+++ b/doc/if.html
@@ -1,102 +1,102 @@
<HTML>
<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
</CENTER>
<HR>
<H3>if command
</H3>
<P><B>Syntax:</B>
</P>
<PRE>if value1 operator value2 then t1 t2 ... else e1 e2 ...
</PRE>
<UL><LI>value1 = 1st value
<LI>operator = "<" or "<=" or ">" or ">=" or "==" or "!="
<LI>value2 = 2nd value
<LI>then = required word
<LI>t1,t2,...,tN = one or more LAMMPS commands to execute if condition is met, each enclosed in quotes
<LI>else = optional argument
<LI>e1,e2,...,eN = one or more LAMMPS commands to execute if condition is not met, each enclosed in quotes (optional arguments)
</UL>
<P><B>Examples:</B>
</P>
<PRE>if ${steps} > 1000 then exit
if $x <= $y then "print X is smaller = $x" else "print Y is smaller = $y"
if ${eng} > 0.0 then "timestep 0.005"
if ${eng} > ${eng_previous} then "jump file1" else "jump file2"
</PRE>
<P><B>Description:</B>
</P>
<P>This command provides an in-then-else capability within an input
script. Two values are numerically compared to each other and the
result is TRUE or FALSE. Note that as in the examples above, either
of the two values can be variables, as defined by the
<A HREF = "variable.html">variable</A> command, so that when the if command is
executed, the variable(s) will be evaluated, which could calculate a
user-defined formula that reflects the current state of the
simulation.
</P>
<P>If the result of the if test is TRUE, then one or more commands (t1,
t2, ..., tN) are executed. If the result of the if test is FALSE and
no optional "else" argument is included, then the if command does
nothing. If the result of the if test is FALSE and the optional
"else" argument is included, then one or more commands (e1,
e2, ..., eN) are executed.
</P>
<P>Each then or else command (t1, e1, etc) can be any valid LAMMPS input
script command. Each command should be enclosed in quotes, so it will
be treated as a single argument, as in the examples above.
</P>
<P>Note that by using the line continuation character "&", the if command
can be spread across many lines, though it is still a single
command:
</P>
<PRE>if $a < $b then &
- "print Minimum value = $a"
+ "print Minimum value = $a" &
"run 1000" &
else &
"print Minimum value = $b" &
"minimize 0.001 0.001 1000 10000"
</PRE>
<P>Note that if any executed comand is a bogus LAMMPS command, such as
"exit" 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 <A HREF = "variable.html">variable
delete</A> 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 double loop which uses the if and
<A HREF = "jump.html">jump</A> commands to break out of the inner loop when a
condition is met, then continues iterating thru the outer loop.
</P>
<PRE>label loopa
variable a loop 5
label loopb
variable b loop 5
print "A,B = $a,$b"
run 10000
if $b > 2 then "jump in.script break"
next b
jump in.script loopb
label break
variable b delete
</PRE>
<PRE>next a
jump in.script loopa
</PRE>
<P><B>Restrictions:</B> none
</P>
<P><B>Related commands:</B>
</P>
<P><A HREF = "variable.html">variable</A>, <A HREF = "print.html">print</A>
</P>
<P><B>Default:</B> none
</P>
</HTML>
diff --git a/doc/if.txt b/doc/if.txt
index ac7cbbc00..ca823f030 100644
--- a/doc/if.txt
+++ b/doc/if.txt
@@ -1,96 +1,96 @@
"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
if command :h3
[Syntax:]
if value1 operator value2 then t1 t2 ... else e1 e2 ... :pre
value1 = 1st value
operator = "<" or "<=" or ">" or ">=" or "==" or "!="
value2 = 2nd value
then = required word
t1,t2,...,tN = one or more LAMMPS commands to execute if condition is met, each enclosed in quotes
else = optional argument
e1,e2,...,eN = one or more LAMMPS commands to execute if condition is not met, each enclosed in quotes (optional arguments) :ul
[Examples:]
if $\{steps\} > 1000 then exit
if $x <= $y then "print X is smaller = $x" else "print Y is smaller = $y"
if $\{eng\} > 0.0 then "timestep 0.005"
if $\{eng\} > $\{eng_previous\} then "jump file1" else "jump file2" :pre
[Description:]
This command provides an in-then-else capability within an input
script. Two values are numerically compared to each other and the
result is TRUE or FALSE. Note that as in the examples above, either
of the two values can be variables, as defined by the
"variable"_variable.html command, so that when the if command is
executed, the variable(s) will be evaluated, which could calculate a
user-defined formula that reflects the current state of the
simulation.
If the result of the if test is TRUE, then one or more commands (t1,
t2, ..., tN) are executed. If the result of the if test is FALSE and
no optional "else" argument is included, then the if command does
nothing. If the result of the if test is FALSE and the optional
"else" argument is included, then one or more commands (e1,
e2, ..., eN) are executed.
Each then or else command (t1, e1, etc) can be any valid LAMMPS input
script command. Each command should be enclosed in quotes, so it will
be treated as a single argument, as in the examples above.
Note that by using the line continuation character "&", the if command
can be spread across many lines, though it is still a single
command:
if $a < $b then &
- "print Minimum value = $a"
+ "print Minimum value = $a" &
"run 1000" &
else &
"print Minimum value = $b" &
"minimize 0.001 0.001 1000 10000" :pre
Note that if any executed comand is a bogus LAMMPS command, such as
"exit" in the first example above, then executing the command will
cause LAMMPS to halt.
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 "variable
delete"_variable.html for info on how to delete the associated loop
variable, so that it can be re-used later in the input script.
Here is an example of a double loop which uses the if and
"jump"_jump.html commands to break out of the inner loop when a
condition is met, then continues iterating thru the outer loop.
label loopa
variable a loop 5
label loopb
variable b loop 5
print "A,B = $a,$b"
run 10000
if $b > 2 then "jump in.script break"
next b
jump in.script loopb
label break
variable b delete :pre
next a
jump in.script loopa :pre
[Restrictions:] none
[Related commands:]
"variable"_variable.html, "print"_print.html
[Default:] none