.\"determine whether or not a given variable is null.

.DT
nullp
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nullp

Name
.SI 5
nullp() - determine whether or not a given variable is null.

.EI
Synopsis
.SI 5
int nullp(mixed arg);

.EI
Description
.SP 5 5
Return 1 if `arg' is null.  'arg' will be null in the following
cases:

1) it has not yet been initialized.

2) it points to a destructed object.

.EP
See also
.SI 5
undefinedp(3), mapp(3), stringp(3), pointerp(3), objectp(3), intp(3).
.EI
