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How do you make a copy of a string with the first and last character removed?

INPUT OUTPUT
$hello$ hello
Toothpick Anemone
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1 Answers1

0

Here is the code to do it

istring[1:-1]

Demonstration

# `istring` represents `input string`
istring = "$hello$"

# `ostring` represents `output string`
ostring = istring[1:-1]

print(ostring)
# storage location labeled `ostring` now contains `hello` without `$`

Table of the Indexed String

CHARACTER $ h e l l o $
REVERSE INDEX -7 -6 -5 -4 -3 -2 -1
INDEX 0 1 2 3 4 5 6

Additional Explanation

Note that python always subtracts one from the upper limit of a slice index. Thus...

  • istring[1:2] is elements 1 through 1 (inclusive)

  • istring[1:3] is elements 1 through 2 (inclusive)

  • istring[1:4] is elements 1 through 3 (inclusive)

  • istring[1:-1] is elements 1 through -2 (inclusive)

Toothpick Anemone
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  • Since the answer seems to have been posted seconds after the question, this seems like an attempt to use Stack Overflow as a personal blog. I'm not sure that this is a valid use of the site. – John Coleman Jun 06 '23 at 23:30
  • @JohnColeman It's possible this is a duplicate, but it's not an unreasonable question to post with the intent of a self-answer. (I'm not sure the table is necessary, nor is an extended explanation of indexing and slicing particularly on-topic.) – chepner Jun 06 '23 at 23:33