Probability Values in Logistic Regression/Decision Tree output

Unable to get actual probability values BY DEFAULT along with prediction, while running Logistic Regression or Decision Tree

Please help with following questions:
1. Is there an API that can be called to force output to include Probability values along with predicted values?
2. Does it require customization? if so in which package/class?

Please let me know if I can provide any further information.

Thanks and Regards,

Tamilselvan Palani