var := UPPER string
The STx command
UPPER converts its string argument to upper case. Note that this command, transgressing the concept of orthogonality in programming, will only process its first argument. Any further arguments will be silently discarded, not even causing an error message to be emitted or a return code to be set.
#a := upper e!ns // #a will be set to "E!NS" #b := upper e!ns zwo threeish // #b will also be set to "E!NS"