Agreeing with comment by @mark-plotnick, OP has to ensure that the script is run by csh, e.g., by adding the "hash-bang" line:

#!/bin/csh

or running the script using the appropriate program:

csh ./foo

As a general rule, if a script lacks this information it will be run using /bin/sh

Further reading:

• The #! magic, details about the shebang/hash-bang mechanism on various Unix flavours
• 3.16) Why do some scripts start with #! ... ? Unix - Frequently Asked Questions (3/7)

Agreeing with comment by @mark-plotnick, OP has to ensure that the script is run by csh, e.g., by adding the "hash-bang" line:

#!/bin/csh

or running the script using the appropriate program:

csh ./foo

As a general rule, if a script lacks this information it will be run using /bin/sh

Further reading:

• The #! magic, details about the shebang/hash-bang mechanism on various Unix flavours
• 3.16) Why do some scripts start with #! ... ? Unix - Frequently Asked Questions (3/7)