A LET expression defines variables var1, var2, … or field symbols , , … as local auxiliary fields in an expression and assigned values to them. When declared, the auxiliary fields can be used in the operand positions of the expression. There is no way of accessing an auxiliary field statically outside its expression.
See example below:
Execution result:
Another example: Defines three local auxiliary variables, x, y, and z, in a constructor expression to construct the values of a structure. The values of the auxiliary variables are used for the structure components.
Execution result:
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