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The Formula Parsing VIs accept only the following variables:

a, a0, ..., a9

b, b0, ..., b9

.

.

.

z, z0, ..., z9

Note  For variable and function names, only lowercase letters are allowed. The VIs interpret capital letters as errors.

All numbers in exponential notation use the 1E–1 convention with the capital letter E. Using 1e–1 with the lowercase letter e results in an error message.