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

问题

This question already has answers here:

Check existence of input argument in a Bash shell script (9 answers)

Closed 3 years ago.

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.

回答1:

You can try like this,

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

来源：https://stackoverflow.com/questions/34925224/how-can-i-check-if-no-arguments-are-given