STRING(1)                   General Commands Manual                  STRING(1)

NNAAMMEE
       string - conditional testing whether a string is defined

DDEESSCCRRIIPPTTIIOONN
       mystr not yet defined
       now defined

       mymac not yet defined
       now defined

       myren not yet defined
       now defined

       standard macro is defined

       identifier and tab:      mystr is defined

       escape sequence after identifier: -mystr is defined

       backslash in name: \ is defined

       dot in name: . is defined \. is defined

       invalid escape in name: G is defined \G is defined

OpenBSD                          June 3, 2022                        STRING(1)