EXPR(1) | User Commands | EXPR(1) |

# NAME

expr - evaluate expressions# SYNOPSIS

**expr**

*EXPRESSION*

**expr**

*OPTION*

# DESCRIPTION

**--help**- display this help and exit

**--version**- output version information and exit

- ARG1 | ARG2
- ARG1 if it is neither null nor 0, otherwise ARG2

- ARG1 & ARG2
- ARG1 if neither argument is null or 0, otherwise 0

- ARG1 < ARG2
- ARG1 is less than ARG2

- ARG1 <= ARG2
- ARG1 is less than or equal to ARG2

- ARG1 = ARG2
- ARG1 is equal to ARG2

- ARG1 != ARG2
- ARG1 is unequal to ARG2

- ARG1 >= ARG2
- ARG1 is greater than or equal to ARG2

- ARG1 > ARG2
- ARG1 is greater than ARG2

- ARG1 + ARG2
- arithmetic sum of ARG1 and ARG2

- ARG1 - ARG2
- arithmetic difference of ARG1 and ARG2

- ARG1 * ARG2
- arithmetic product of ARG1 and ARG2

- ARG1 / ARG2
- arithmetic quotient of ARG1 divided by ARG2

- ARG1 % ARG2
- arithmetic remainder of ARG1 divided by ARG2

- STRING : REGEXP
- anchored pattern match of REGEXP in STRING

- match STRING REGEXP
- same as STRING : REGEXP

- substr STRING POS LENGTH
- substring of STRING, POS counted from 1

- index STRING CHARS
- index in STRING where any CHARS is found, or 0

- length STRING
- length of STRING

- + TOKEN
- interpret TOKEN as a string, even if it is a

- keyword like 'match' or an operator like '/'

- ( EXPRESSION )
- value of EXPRESSION

# AUTHOR

Written by Mike Parker, James Youngman, and Paul Eggert.# REPORTING BUGS

GNU coreutils online help: <http://www.gnu.org/software/coreutils/># COPYRIGHT

Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.# SEE ALSO

Full documentation at: <http://www.gnu.org/software/coreutils/expr>September 2017 | GNU coreutils 8.28 |