LET
===

Function
--------

**LET** assigns a value to a variable.

Syntax
------

| LET variable name = numerical expression
| LET string variable = string expression

Examples
--------

::

   LET C = 5
   LET D3 = B
   LET J = SIN(X)
   LET A$ = "HELLO"
   LET A$ = B$ '(see note)

Use of LET in an assignment statement is optional. The formats:

::

   C = 5
   D3 = B
   J = SIN(X)
   A$ = "HELLO"
   A$ = B$ '(see notes below)

are equally acceptable.

Remarks
-------

When equating string arrays of unequal length the string array on the
right side of the equates will be truncated on the left side.

Example:

::

   DIM A$(1,5)
   A$ = "HELLO"
   B$ = "GOODBYE"
   A$ = B$

then A$ = "GOODB"

.. Note::

   Remember that string lengths default to 20 characters. In the
   above example, A$ should be DIMed to 5 character length as shown.

Strings can be created by multiple additions.

Example:

::

   A$ = A$ + MID$(C$,4,3)+CHR$(65)

String expressions can also be created from complex string expressions
of up to 10 functions. The derivation of the function requires the
creation of an expression stack which can handle a maximum of ten
functions. If the stack is exceeded a 'string complexity' error will
result.

Example:

::

   A$ = LEFT$(RIGHT$(MID$(A$,3,N),A),B)