Snippet

Snippet[doc] gives a snippet of text from a document or other content object.

• Snippet[doc, n] gives about n lines from the beginning.
• Snippet[doc, -n] gives about n lines from the end.
• Snippet[doc, n1;;n2] gives a span from lines n1 to n2.
• Snippet[doc, n1;;n2;;n3] gives a span from lines n1 to n2 in steps of n3.
• Snippet[ContentObject[...], SearchResultObject[...]] gives contextual snippets from a content object based on search results.

Examples

Get first 5 lines from a file:

Snippet[File["example.txt"], 5]

Get last 3 lines:

Snippet[File["example.txt"], -3]

Get a range of lines:

Snippet[File["example.txt"], 10;;20]

Please visit the official Wolfram Language Reference for more details.