How can i check if no arguments are given [duplicate]

Question

I want to check if the user has given the script any arguments and if this is the case, the script should close.

if [ $@ = "" ]; then exit fi

is not working.

Note, the reason this doesn't work, is that you need to put double quotes around $@ because of how bash handles empty strings. Unquoted, the first line becomes if [ = "" ]; then when no arguments are passed in, which results in a syntax error. Quoted, you have if [ "" = "" ]; then, which is treated as expected. — Zoey Hewll
– Zoey Hewll, Commented Oct 4, 2017 at 6:02

Adem Öztaş · Accepted Answer · 2016-01-21 13:41:06Z

2

You can try like this,

if [ "$#" -eq 0 ]; then echo "Illegal number of parameters" fi

answered Jan 21, 2016 at 13:41

21.6k5 gold badges36 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1