What does this line mean in bash scripting?

Question

This is the line I am confused with.

while (! -e $1/$2)

What does it mean?

Answer 1

It strongly looks like tcsh syntax and not bash . If it is supposed to be bash , the syntax is incorrect.

On the other hand if it is tcsh , the line is looping while the file defined by those two arguments $1 and $2 does not exist (perhaps $1 defines a folder and $2 defines a file or something similar).

-e checks the existence of a file. Source: http://www.tcsh.org/tcsh.html/File_inquiry_operators.html