Beginner · Lesson 4 of 12
Operators & expressions
An expression produces a value. Arithmetic operators combine numbers, and comparison operators answer questions. Parentheses make the intended order explicit and help the reader follow a calculation.
Try it for yourself
Run the example, then change one thing and see what happens.
main.jsYour ideas, in code.
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Run your code to see the output here.
Ready to buildUTF-82 lines
Expected output
40
Make it your own
Calculate the total cost of three items priced at 12 each.
A quick check
Which habit helps when learning operators & expressions?