Write a function delnthc to delete the n-th character of a string. You may assume that the input string is always longer than n. delnthc("abcdef", 4) → "abcef

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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  1. Write a function delnthc to delete the n-th character of a string. You may assume that the input string is always longer than n.
    delnthc("abcdef", 4) → "abcef"
  2. Write a function multin to take a list of three [a,b,c] and multiplies a by b c times. Function definition must look like multin(L)! CAN NOT USE multin(a,b,c). You have to use let-in-end in if-then-else style NOT @
    CAN NOT USE function power(a,b) =a*a*a...,
    multin [2,3,5] → [2,6,18,54,162,486]
  3. Write a function pairStar to form a new string where identical chars that
    are adjacent in the original string are separated from each other by a "*"
    pairStar("xxyy") → "x*xy*y", pairStar("aaaa") → "a*a*a*a"
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