## Function: COMMON-LISP:PARSE-INTEGER
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> Examine the substring of string delimited by start and end
> (default to the beginning and end of the string)  It skips over
> whitespace characters and then tries to parse an integer. The
> radix parameter must be between 2 and 36.

### Lambda list
```cl
(string &key sb-impl::start sb-impl::end sb-impl::radix sb-impl::junk-allowed)
```