C Shell

C Shell
This programming language may be used to instruct a computer to perform a task.

Execution method:	Interpreted
See Also:	C Shell on the HOPL

Listed below are all of the tasks on Rosetta Code which have been solved using C Shell.

C Shell is an implementation of UNIX Shell. Other implementations of UNIX Shell.

csh was the shell that William Joy wrote for BSD. csh accepted the same Unix commands as other shells, but had a very different syntax (for variable assignments, control flow, and such). csh is not compatible with the Bourne Shell.

BSD keeps the C shell at /bin/csh, but few persons use it.

Hashbang lines for C shell scripts should use the -f option:

<lang csh>#!/bin/csh -f</lang>

Syntax

C	C Shell	Bourne Shell
<lang c>#include <stdio.h> int main() { int n; n = 13; printf("%d\n", n); while (n != 1) { if (n % 2) n = 3 * n + 1; else n /= 2; printf("%d\n", n); } return 0; }</lang>	<lang csh> @ n = 13 echo $n while ($n != 1) if ($n % 2) then @ n = 3 * $n + 1 else @ n /= 2 endif echo $n end </lang>	<lang bash> n=13 echo $n while test $n -ne 1; do if expr $n % 2 >/dev/null; then n=`expr 3 \* $n + 1` else n=`expr $n / 2` fi echo $n done </lang>

<lang csh>% @ n = 10 - 3 - 2 % echo $n 9</lang>

<lang csh>% @ n = (10 - 3) - 2 % echo $n 9</lang>

Links

• csh(1) manual
• Csh Programming Considered Harmful
• Top Ten Reasons not to use the C shell