[Solved] Why does awk '{print $NF}' file.txt print the last field of each line? - Ans: NF is a built-in variable holding the number of fields in the current line | Bash Scripting

Bash Scripting - Text Processing in Scripts

Why does awk '{print $NF}' file.txt print the last field of each line?

A<code>NF</code> is a built-in variable holding the number of fields in the current line

B<code>NF</code> is the first field of the line

C<code>NF</code> is the total number of lines in the file

D<code>NF</code> is a user-defined variable

Step-by-Step Solution

Solution:

Step 1: Understand NF variable
NF is a special awk variable that stores the number of fields in the current line.
Step 2: Using $NF to print last field
$NF accesses the field number equal to NF, which is the last field.
Final Answer:
NF is a built-in variable holding the number of fields in the current line -> Option A
Quick Check:
$NF prints last field [OK]

Quick Trick: Use $NF to print last field dynamically [OK]

Common Mistakes:

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Why does awk '{print $NF}' file.txt print the last field of each line?