Package: coreutils
Version: 5.2.1-2
Severity: normal
man expr
...
expr exits with:
0 if the expression is neither null nor 0; 1 if the expression
is null or 0; or 2 for invalid expressions.
...
eg:
$ expr 1 - a
$ expr: non-numeric argument
$ echo $?
$ 3
-- paolo
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.12-rc3-ck1-bs-ss-pm.1
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
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