General Tech QA/Testing 2 years ago
Posted on 16 Aug 2022, this text provides information on QA/Testing related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
It is:
if [ $# -eq 0 ]
then
echo "No arguments supplied"
fi
The $# variable will tell you the number of input arguments the script was passed.
Or you can check if an argument is an empty string or not like:
if [ -z "$1" ]
then
echo "No argument supplied"
fiThe -z switch will test if the expansion of "$1" is a null string or not. If it is a null string then the body is executed.
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manpreet![Tuteehub forum best answer]()
Best Answer
2 years ago
I need to check the existence of an input argument. I have the following script
I get
How do I check the input argument1 first to see if it exists?