Let

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.

Syntax:  

Let variablename=expression

 

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:

Example	Result
Set x=3+4; Let y=3+4 z=$(y)+1;	$(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.