how to remove -- from sas date

[vraj1]

I have a date which is "2006-07---" and i want to remove "---" as those are missing dates and make it to "2006-07".

any suggestion on how to do it. basically make these --- to iso date format

[PaigeMiller]

Use the TRANWRD function

https://documentation.sas.com/?cdcId=pgmmvacdc&cdcVersion=9.4&docsetId=lefunctionsref&docsetTarget=p...

[Reeza]

- or x is the ISO 8601 standard to denote a missing component. Your data already uses the --.
http://support.sas.com/documentation/cdl/en/leforinforref/64790/HTML/default/viewer.htm#p1a0qt18rxyd...

[Ksharp · Accepted solution]

data _null_;
x="2006-07---   ";
y=prxchange('s/\-+$//',1,strip(x));
put x= y=;
run;