Sysout will show the output in the console.

You can also use oLog.infoForced("Your message") in a Java step which will write the message to the Pega Logs.

Thanks.

Just to confirm when u say console, i beleive you mean application server logs (eg in case of apache-tomcat it will be visible in catalina.out) correct ?

Also Is the output also visible in the tracer tool? If yes where can we view the output in the tracer when we test execute the activity

If You are trying to debug an activity and hence want to look at a value in the tracer, the easiest way would be to set the value to a param variable and that should be available for you to look in the tracer.

When you use System.out.println it uses to print in system out of the application server log files i.e. application server console these output values are printed.

System.out writes into System out file for example in websphere. Pega has customized loggers which can be used and the out put can be seen in pega log files. 

for logging you can also Log-message method in activity and see the same event in tracer (if logging is enabled).

Thanks,

Ashok