195. Tenth Line

Description of Problem

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

Example:

Assume that file.txt has the following content:

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:

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.

Solution

Tags: Shell Script

Explanation

The problem does not need explanation.

Code (sh)

tail -n +10 file.txt | head -n 1

awk 'NR == 10 {print; exit}' file.txt

sed -n '10p' < file.txt