The empty string should not be confused with the empty language ∅, which is a formal language (i.e. a set of strings) that contains no strings, not even the empty string. The empty string has several properties: |ε| = 0. Its string length is zero. ε ⋅ s = s ⋅ ε = s. The empty string is the identity element of the concatenation operation
E, or e, is the fifth letter and the second vowel letter in the modern English alphabet and the ISO basic Latin alphabet.Its name in English is e (pronounced / ˈ iː /); plural ees, Es or E's.
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after having his medical prescription, allegedly altered and out of standards required by the Brazil..