Expressions

Syntax: expr Sequence of Words

• Arguments of expr are concatenated and evaluated as an algebraic expression.
• C-like expressions with extra support for strings.
• Command, variable substitution occurs within expressions.
• Used in some other commands besides expr.

Examples:

set b 5

5

expr ($b*4) - 3

17

expr $b <= 2

0

expr $a * cos(2*$b)

-5.03443