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version 1.9, 1995/04/28 23:27:13

version 1.10, 1997/10/20 08:51:56

Line 10

.Nm expr

.Nd evaluate expression

.Sh SYNOPSIS

.Nm expr

.Nm

.Ar expression

.Sh DESCRIPTION

The

.Nm expr

.Nm

utility evaluates

.Ar expression

and writes the result on standard output.

.Pp

All operators are separate arguments to the

.Nm expr

.Nm

utility.

Characters special to the command interpreter must be escaped.

.Pp

Line 88 The following example returns the number

.El

.Sh DIAGNOSTICS

The

.Nm expr

.Nm

utility exits with one of the following values:

.Bl -tag -width Ds -compact

.It 0

Line 100 the expression is invalid.

.El

.Sh STANDARDS

The

.Nm expr

.Nm

utility conforms to

.St -p1003.2 .