topic if ^ a then do in SAS Programming

if ^ a then do

tianwang — Sun, 18 Jun 2017 17:19:43 GMT

I'm not sure what the "^" mean here: if ^ a then do...

does it mean "if ^= a then do"?

thanks

Re: if ^ a then do

Astounding — Sun, 18 Jun 2017 17:30:01 GMT

In this context, ^ means "not". The evaluation of "a" is considered to be false when a is either missing or zero. Any other value gets evaluated as true. So "^ a" gets evaluated as true whenever a is missing or zero. Any other value gets evaluated as false. Putting it all together:

if ^ a then do;

The statements that follow get performed whenever the variable A is either missing or zero.

Re: if ^ a then do

kiranv_ — Sun, 18 Jun 2017 17:30:37 GMT

^ is not

so ^= not equal to

Re: if ^ a then do

tianwang — Sun, 18 Jun 2017 17:53:05 GMT

thanks!

Re: if ^ a then do

Reeza — Sun, 18 Jun 2017 19:41:46 GMT

For future reference the list of operators is here:

https://support.sas.com/documentation/cdl/en/lrcon/69852/HTML/default/viewer.htm#p00iah2thp63bmn1lt20esag14lh.htm