The syntax for the SET command is:

S argl,arg$2...$argx

The statement

S VAR$=$EXP

replaces $($or defines$)$ the variable VAR with the value of the expression EXP. The data type of VAR is determined by the expression.

Question. If I execute the following code

R Z S X$=$Z$,$Y$=$X

what type of variables are X$,$ Y and Z$?$

$1.$ All numeric

$2.$ All string

$3.$ X$,$ Y numeric; Z string

$4.$ X numeric; Y$,$ Z string

$5.$ X numeric; Y$,$ Z undefined

$6.$ Can$$t tell without more info