Learn Bash Scripting by Building Five Programs - Build Five Programs countdown.sh

Backend Development
1

Tell us what’s happening:

Hi I am stuck at the countdown.sh which the instruction asks me to use arg1 as the only argument. On the first attempt, I tried arg1. It returned “true”, but did not pass the test. So I tried to copy the answer from the hint using “!arg1”. It returned “bash: !arg1: event not found” and also did not pass the test.

May I please know

  1. How to pass the test even if I copy and paste the answer but it did not pass
  2. what is the meaning of the ! sign here? If it means flipping the true/false value of the arg1, why it has to be there and it was not mentioned to do so in the instructions?

Your code so far

camper: /project$ ./countdown.sh arg1
true
camper: /project$ ./countdown.sh !arg1
bash: !arg1: event not found

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Challenge Information:

Learn Bash Scripting by Building Five Programs - Build Five Programs

2

Try to type in terminal only ./countdown.sh
It worked for me, forget !arg1

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