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konstans@stuy.edu all > repeatFront
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Given a string and an int n, return a string made of the first n characters of the string, followed by the first n-1 characters of the string, and so on. You may assume that n is between 0 and the length of the string, inclusive (i.e. n >= 0 and n <= str.length()).


repeatFront('Chocolate', 4) → 'ChocChoChC'
repeatFront('Daimon', 0) → ''
repeatFront('Soba', 2) → 'SoS'

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def repeatFront(str,n):

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