Tenth Line - Problem
Your mission: Extract the 10th line from a text file named
What you need to do:
• Read from a file called
• Print only the 10th line of that file
• Handle cases where the file might have fewer than 10 lines
Example:
If
Your output should be:
file.txt. Sounds simple? It is! But there are several elegant ways to accomplish this task using shell commands.What you need to do:
• Read from a file called
file.txt• Print only the 10th line of that file
• Handle cases where the file might have fewer than 10 lines
Example:
If
file.txt contains:Line 1
Line 2
...
Line 10
Line 11Your output should be:
Line 10 Input & Output
basic_file.txt
$
Input:
file.txt contains:
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
Line 11
Line 12
›
Output:
Line 10
💡 Note:
The file has more than 10 lines, so we successfully extract the 10th line
exactly_ten_lines.txt
$
Input:
file.txt contains:
First
Second
Third
Fourth
Fifth
Sixth
Seventh
Eighth
Ninth
Tenth
›
Output:
Tenth
💡 Note:
The file has exactly 10 lines, so the 10th line is the last line
fewer_lines.txt
$
Input:
file.txt contains:
Only line 1
Only line 2
Only line 3
›
Output:
(no output)
💡 Note:
The file has fewer than 10 lines, so there's no 10th line to print
Constraints
-
The file is named
file.txt - Each line contains at most 1000 characters
- The file may have anywhere from 0 to 106 lines
- Handle gracefully when file has fewer than 10 lines
Visualization
Tap to expand
Understanding the Visualization
1
File Structure
Text file consists of sequentially numbered lines
2
Line Addressing
Different tools offer various ways to target specific lines
3
Extraction
Output only the content of the 10th line
Key Takeaway
🎯 Key Insight: While all approaches work, `sed -n '10p'` provides the most efficient solution with direct line addressing, avoiding unnecessary data processing and offering the cleanest syntax for this specific task.
💡
Explanation
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// Output will appear here after running code