My confusion was inspired by this question. The OP asked to identify an electrolytic surface mount capacitor and its ratings. I answered assuming the pictured capacitor's capacitance was a three digit code. I made that assumption from previous purchases I've made where the printed markings were three digit codes.
Other posters said that the markings were the literal values. I looked it up and indeed many electrolytic surface mount capacitors are marked with the actual value.
My question is for electrolytic surface mount capacitors how can one tell when the value marked is a three digit code or when is the mark the literal value?