Linux CLI - Text Processing
What will be the output of this command?
echo "apple 10 red" | awk '{print $2+$3}'What will be the output of this command?
medium📝 Command Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand field values and operation
$2 is "10" (number), $3 is "red" (string). Adding number + string in awk treats string as 0.Step 2: Calculate result of addition
10 + 0 = 10, but since $3 is non-numeric, awk treats it as 0, so output is 10 + 0 = 10.Step 3: Test actual behavior
Awk treats non-numeric string as 0 in numeric context, so output is 10 + 0 = 10.Final Answer:
10 -> Option AQuick Check:
Non-numeric fields treated as 0 in arithmetic [OK]
Quick Trick: Non-numeric fields become 0 in arithmetic operations [OK]
Common Mistakes:
- Concatenating fields instead of adding
- Expecting error on string addition
- Ignoring numeric conversion rules
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