Issues with c shell escape character for *

Question

So first and foremost, this is homework. Just struggling with something that I can't find out too much information about through google.

Question is print the product of the integers from 1 through the number entered.

So if we input 4, we give 24 (1*2*3*4) as the output.

My question is, I can't figure out how to escape the * character to concatenate it to my string. I have this working on bourne shell, but keep running into this issue in c shell.

@ temp = 1
@ ans = 1
while ( $temp <= $number )
    @ ans = ( $ans * $temp )
    @ temp = ( $temp + 1 )
end
set ans = "$ans ("
@ count = 1
while ( $count <= $number )
    set ans = "$ans$count"
    @ count = ( $count + 1 )
    if ( $count <= $number ) then
        set ans = "$ans*"
    endif
end
set ans = "$ans)"
echo $ans

Any help or pointers would be much appreciated. Thanks!

score 1 · Answer 1 · edited May 23 '17 at 12:15

1

set star = "*"
set ans = "$ans$star"

Edit How do I escape the wildcard/asterisk character in bash? Quotes needed for your echo:

echo "$ans"

edited May 23 '17 at 12:15

Community

1
1

answered Feb 18 '16 at 06:35

Riftus

394
4
14

Thought about this. Actually tried that already before posting. I still get a echo:No match. when trying to echo out ans. – codenko Feb 18 '16 at 06:37
You're linking to a bash question. This is about csh. – Martin Tournoij Feb 18 '16 at 08:10

score 1 · Answer 2 · answered Feb 18 '16 at 07:12

When echoing variables, use double quotes around the variable (echo "$ans") to avoid having the shell expand metacharacters in the variable's value:

(Script file: prod.csh):

#!/bin/tcsh

@ number = 6
@ temp = 1
@ ans = 1
while ( $temp <= $number )
    @ ans = ( $ans * $temp )
    @ temp = ( $temp + 1 )
end
set ans = "$ans ("
@ count = 1
while ( $count <= $number )
    set ans = "$ans$count"
    @ count = ( $count + 1 )
    if ( $count <= $number ) then
        set ans = "$ans*"
    endif
end
set ans = "$ans)"
echo "$ans"

Example run:

$ tcsh prod.csh
720 (1*2*3*4*5*6)
$

You can also use `set noglob` by the way, which is sometimes useful as adding quotes can get tricky in some situations. — Martin Tournoij, Feb 18 '16 at 08:15

Issues with c shell escape character for *

2 Answers2