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diff --git a/man/expr.1 b/man/expr.1 new file mode 100644 index 0000000..abba135 --- /dev/null +++ b/man/expr.1 @@ -0,0 +1,107 @@ +.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.48.5. +.TH EXPR "1" "August 2023" "GNU coreutils 9.4" "User Commands" +.SH NAME +expr \- evaluate expressions +.SH SYNOPSIS +.B expr +\fI\,EXPRESSION\/\fR +.br +.B expr +\fI\,OPTION\/\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" +GNU coreutils online help: <https://www.gnu.org/software/coreutils/> +.br +Report any translation bugs to <https://translationproject.org/team/> +.SH COPYRIGHT +Copyright \(co 2023 Free Software Foundation, Inc. +License GPLv3+: GNU GPL version 3 or later <https://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" +Full documentation <https://www.gnu.org/software/coreutils/expr> +.br +or available locally via: info \(aq(coreutils) expr invocation\(aq |