Checking for null in a script

[manuel]

What is the right syntax to check for a null value?

Can I just use the following?

Code: Select all

if ( a != null) {
...
}

[Martin]

Yes, this code should work:

Code: Select all

a=null;
if (a==null) {
  log("null");
}
else {
  log("not null");
}

or

Code: Select all

a=null;
if (a!=null) {
  log("not null");
}
else {
  log("null");
}