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Diffstat (limited to 'man/expr.1')
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diff --git a/man/expr.1 b/man/expr.1 new file mode 100644 index 0000000..3f1823e --- /dev/null +++ b/man/expr.1 @@ -0,0 +1,113 @@ +.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.35. +.TH EXPR "1" "March 2007" "GNU coreutils 6.9" "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. +.SH "REPORTING BUGS" +Report bugs to <bug\-coreutils@gnu.org>. +.SH COPYRIGHT +Copyright \(co 2007 Free Software Foundation, Inc. +.br +This is free software. You may redistribute copies of it under the terms of +the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. +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 expr +.PP +should give you access to the complete manual. |