The let statement is a complement to the set statement, used for defining script variables. The let statement, in opposition to the set statement, evaluates the expression on the right side of the ' =' before it is assigned to the variable.
The word let may be omitted, but the statement then becomes a control statement. Such a statement without the keyword let must be contained within a single script row and may be terminated either with a semicolon or end-of-line.
Examples and results:
$(x) will be evaluated as ' 3+4 '
$(y) will be evaluated as ' 7 '
$(z) will be evaluated as ' 8 '
|Let T=now( );||$(T) will be given the value of the current time.|