symbol to string?

I couldn’t find it in here, where else could I have looked? https://code.kx.com/trac/wiki/QforMortals2/casting_and_enumerations

KDB+ 2.7 2011.04.30

q)a:`$“foo bar”

`foo bar

q)“c”$a

'type

doh found it: https://code.kx.com/trac/wiki/Reference/string

q)a:`$“foo bar”

q)string a

“foo bar”