minix man page for expr

EXPR(1) 						      General Commands Manual							   EXPR(1)

NAME
       expr - evaluate experession

SYNOPSIS
       expr arg ...

EXAMPLES
       x=`expr	+ 1`	   # Add 1 to shell variable x

DESCRIPTION
       Expr  computes the value of its argument and writes the result on standard output.  The valid operators, in order of increasing precedence,
       are listed below.  Operators grouped by {...} have the same precedence.	The operators are: |, &, {<, <=, ==, !=, >=, >}, {+, -}, *, /,	%,
       and :.  Parentheses are permitted.

SEE ALSO
       sh(1), test(1).

																	   EXPR(1)