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Unix Shell Script MCQs

What is the error in the following shell script code?
1. until=1
2. while [ $until -eq 5 ]
3. do
4. echo until cannot be used as a variable name
5. until=`expr $until + 1`
6. done

Line 1 should be until=$1

Until cannot be used as a variable name

There is no error

Line 4 should be echo

Line 4 should be enclosed within { }

Answer

Correct Answer:

Line 1 should be until=$1

Explanation:

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