[LeetCode] 195. Tenth Line

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Problem

Given a text file file.txt, print just the 10th line of the file.

Example:

Assume that file.txt has the following content:

1
2
3
4
5
6
7
8
9
10
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10

Your script should output the tenth line, which is:

1
Line 10

Note:

  1. If the file contains less than 10 lines, what should you output?
  2. There’s at least three different solutions. Try to explore all possibilities.

Explanation

  1. We can use sed to solve this problem. -n means prints all lines. p limit which line to print.

Solution

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2
# Read from the file file.txt and output the tenth line to stdout.
sed -n 10p file.txt