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left$ and left$$   function

subPascalString = left$(PascalString, numChars)
subContainer$$ = left$$(container$$, numChars)

This function returns a substring or subcontainer consisting of the leftmost numChars characters of PascalString or container$$. If numChars is greater than the length of PascalString or container$$, then left$ returns the entire string or container. If numChars is zero, then left$ returns an empty (zero-length) string.

You may not use complex expressions that include containers on the right side of the equal sign. Instead of using:
c$$ = c$$ + left$$(a$$,10)
c$$ += left$$(a$$,10)

See Also:
mid$ function; right$