Serial.print kontra println

Once the channel is open, you send text with Serial.print(). Whatever you pass shows up in the Serial Monitor on your computer.

The key thing about Serial.print() is that it does not move to a new line. The next print appears right after it.

Those two prints produce HiThere, jammed together with no gap. Print never adds spacing for you.

Use Serial.println() when you want each message on its own line. The ln means it adds a line break at the end.

That gives you two tidy rows in the Monitor. println is your go-to for status messages you read top to bottom.

You are not limited to text. Pass a number and Serial.print() converts it to readable digits automatically.

Mix text and values for clarity. Print the label first, then print the number, so output reads like a sentence.

A bare number like 42 means nothing later. A label like Score: 42 tells you exactly what you are looking at.

Calls to print and println usually live in loop(), so values keep streaming out as your program runs.

A neat habit: print the label, then println the value. The label glues to the number, then the line wraps cleanly.

Reach for print when more output follows on the same line, and println when this is the end of the line. 🙂

Which call ends the current line and moves output to the next row?

You learned that print keeps output on one line while println adds a break, and that labeling values makes your Monitor easy to read. 🎉