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+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.35.
+.TH EXPR "1" "May 2012" "GNU coreutils 8.17" "User Commands"
+.SH NAME
+expr \- evaluate expressions
+.SH SYNOPSIS
+.B expr
+\fIEXPRESSION\fR
+.br
+.B expr
+\fIOPTION\fR
+.SH DESCRIPTION
+.\" Add any additional description here
+.TP
+\fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-\-version\fR
+output version information and exit
+.PP
+Print the value of EXPRESSION to standard output.  A blank line below
+separates increasing precedence groups.  EXPRESSION may be:
+.TP
+ARG1 | ARG2
+ARG1 if it is neither null nor 0, otherwise ARG2
+.TP
+ARG1 & ARG2
+ARG1 if neither argument is null or 0, otherwise 0
+.TP
+ARG1 < ARG2
+ARG1 is less than ARG2
+.TP
+ARG1 <= ARG2
+ARG1 is less than or equal to ARG2
+.TP
+ARG1 = ARG2
+ARG1 is equal to ARG2
+.TP
+ARG1 != ARG2
+ARG1 is unequal to ARG2
+.TP
+ARG1 >= ARG2
+ARG1 is greater than or equal to ARG2
+.TP
+ARG1 > ARG2
+ARG1 is greater than ARG2
+.TP
+ARG1 + ARG2
+arithmetic sum of ARG1 and ARG2
+.TP
+ARG1 \- ARG2
+arithmetic difference of ARG1 and ARG2
+.TP
+ARG1 * ARG2
+arithmetic product of ARG1 and ARG2
+.TP
+ARG1 / ARG2
+arithmetic quotient of ARG1 divided by ARG2
+.TP
+ARG1 % ARG2
+arithmetic remainder of ARG1 divided by ARG2
+.TP
+STRING : REGEXP
+anchored pattern match of REGEXP in STRING
+.TP
+match STRING REGEXP
+same as STRING : REGEXP
+.TP
+substr STRING POS LENGTH
+substring of STRING, POS counted from 1
+.TP
+index STRING CHARS
+index in STRING where any CHARS is found, or 0
+.TP
+length STRING
+length of STRING
+.TP
++ TOKEN
+interpret TOKEN as a string, even if it is a
+.IP
+keyword like 'match' or an operator like '/'
+.TP
+( EXPRESSION )
+value of EXPRESSION
+.PP
+Beware that many operators need to be escaped or quoted for shells.
+Comparisons are arithmetic if both ARGs are numbers, else lexicographical.
+Pattern matches return the string matched between \e( and \e) or null; if
+\e( and \e) are not used, they return the number of characters matched or 0.
+.PP
+Exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null
+or 0, 2 if EXPRESSION is syntactically invalid, and 3 if an error occurred.
+.SH AUTHOR
+Written by Mike Parker, James Youngman, and Paul Eggert.
+.SH "REPORTING BUGS"
+Report expr bugs to bug\-coreutils@gnu.org
+.br
+GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
+.br
+General help using GNU software: <http://www.gnu.org/gethelp/>
+.br
+Report expr translation bugs to <http://translationproject.org/team/>
+.SH COPYRIGHT
+Copyright \(co 2012 Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
+.br
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+.SH "SEE ALSO"
+The full documentation for
+.B expr
+is maintained as a Texinfo manual.  If the
+.B info
+and
+.B expr
+programs are properly installed at your site, the command
+.IP
+.B info coreutils \(aqexpr invocation\(aq
+.PP
+should give you access to the complete manual.