LET assigns a value to a variable. The calculated value of n is stored by the variable. 
Syntax
[LET] varnam = n
Parameters
varnam (string): name of variable
n (string, numeric): expression, corresponding to variable type
Remarks
LET is not necessary for assigning a value to a variable, you normally use varnam = n. 
Usable since script version 1.1 (Allplan 2012-1).
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