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tmhscs@gmail.com strings > string_isIsogram
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string_isIsogram -- an isogram contains the no repeat letters. Given a String containing a single word return true if it is an isogram, otherwise return false.


string_isIsogram("algorithms") → true
string_isIsogram("computer") → true
string_isIsogram("science") → false

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public boolean string_isIsogram(String str){ }

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