Coming mostly from Javascript, I'm still getting used to Arduino syntax. Sometimes I just want to run a line of Arduino to try to understand the language. As opposed to writing a sketch with a bunch of Serial.println's, uploading it to my Arduino Uno, watching the serial monitor, etc.
In Javascript I can run lines of code one by one in DevTools. In Ruby, I can run lines of code one by one with the Interactive Ruby Shell. I believe these are referred to as REPLs.
Is there anything like a REPL for the Arduino language?