csh script error: Variable name must begin with a letter

Question

set number = $<
set n = @ $number % 2

I am new to csh. I am simply trying to understand basic stuff. I am getting this error: set: Variable name must begin with a letter. How do I fix it?

Answer 1

You are using the @ command incorrectly. In order to evaluate and store the result of an expression:

set number = $<
@ n = ($number % 2)

But Csh is particularly painful to use as a scripting language -- you are better off using bash or Python instead. I strongly recommend reviewing these:

• Csh Programming Considered Harmful
• Top Ten Reasons not to use the C shell.