if ^( (code='4')...... what does the ^ do?

[JMarkW]

while reading somebody else's code I see if ^( (format_code='4'). I'm not familiar with the ^ before the (.

Does anybody know of a purpose for the ^?

[Doc_Duke]

"^" is the "NOT" infix operator.

^(code='4') is the same as NOT (code='4').

See the description of logical operators in the base SAS documentation.

Doc Muhlbaier
Duke