[Solved] What will be the output of this script?unset user user="" echo "Current user: ${user:-guest}" - Ans: Current user: | Bash Scripting

Bash Scripting - String Operations

What will be the output of this script?

unset user
user=""
echo "Current user: ${user:-guest}"

ACurrent user: guest

BCurrent user:

CCurrent user: user

DCurrent user: ${user:-guest}

Step-by-Step Solution

Solution:

Step 1: Analyze variable state
user is unset then set to an empty string.
Step 2: Apply default value logic
${user:-guest} returns guest only if user is unset or null. Since user is set to empty string (which is set but null), it returns empty string.
Final Answer:
Current user: -> Option B
Quick Check:
Empty string is treated as set, so default is not used [OK]

Quick Trick: Empty string is treated as set, so default is not used [OK]

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