EXPR(1) EXPR(1) expr - evaluate expressions expr expr --help --version . . : 1 | 2 1 0, 2 1 & 2 1 0, 0 1 < 2 1 2 1 <= 2 1 2 1 = 2 1 2 1 != 2 1 2 1 >= 2 1 2 1 > 2 1 2 1 + 2 1 2 1 - 2 1 2 1 * 2 1 2 1 / 2 1 2 1 % 2 1 2 : - match : substr , 1 index , 0 length + , ,,match" ,,/" ( ) . \( \) ; \( \) , 0. 0 0, 1 0, 2 , 3 . , . coreutils: Copyright (C) 2024 Free Software Foundation, Inc. 3+: 3 . : . , . ,,info '(coreutils) expr invocation'" ; 3 . . , - TODO <>. coreutils 9.5 2024 EXPR(1)