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Shell Programming and Scripting

syntax problem

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# 1  
Old 03-16-2006
syntax problem
Dear friends,


I am writing shell script in csh .


i want to make arthimatic operation in csh.

i wrote sysntax like this.
set val = 230
set tmp = `0.1 * $val + 300`
echo $tmp

but it is not working .

anyone please give me syntax.
# 2  
Old 03-16-2006
I dont think that csh supports direct math operations. You would have to use expr to do any math. And then expr does not support non integer operations.

Try doing something like this:
Code:
set val = 230
echo $val
set tmp = `echo 0.1 \* $val + 300|bc`
echo $tmp

# 3  
Old 03-16-2006
Use the '@' command in csh.
The '@' command in csh does processing of arithmetic expressions.

See the man page for csh.
# 4  
Old 03-16-2006
Google for ``Csh scripting considered harmful'' for some good reasons why you
should try to avoid scripting in csh.
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