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 ' =' at script run time before it is assigned to the variable.
$(x) will be evaluated as ' 3+4 '
$(y) will be evaluated as ' 7 '
$(z) will be evaluated as ' 8 '
Note the difference between the Set and Let statements. The Set statement assigns the string '3+4' to the variable whereas the Let statement evaluates the string and assigns 7 to the variable.
|Let T=now( );||$(T) will be given the value of the current time.|