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Lancelot03
Lancelot03

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Isograms

An isogram is a word that has no repeating letters, consecutive or non-consecutive. Implement a function that determines whether a string that contains only letters is an isogram. Assume the empty string is an isogram. Ignore letter case.

Example: (Input --> Output)

"Dermatoglyphics" --> true
"aba" --> false
"moOse" --> false (ignore letter case)
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Solution- ###Python

def is_isogram(string):
    string = string.lower()
    return len(set(string)) == len(string)
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