Bash Scripting - Basics
Given the script
What is the output of
hello.sh with content:#!/bin/bash echo "Hello, $1!"
What is the output of
./hello.sh World?Given the script hello.sh with content:
medium📝 Command Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Understand script parameter usage
The script uses$1which is the first argument passed to the script. Here,Worldis passed as the first argument.Step 2: Predict output after substitution
The echo command prints "Hello, World!" by replacing$1with the argument.Final Answer:
Hello, World! -> Option BQuick Check:
Argument $1 replaced by 'World' = A [OK]
Quick Trick: Arguments like $1 print passed values in scripts [OK]
Common Mistakes:
MISTAKES- Printing literal $1 instead of argument
- Missing argument causing empty output
- Assuming syntax error due to shebang
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