JS LOGICChapter 2 · JS Conditionals & Logic

Switch Statements

A switch compares one value against several case labels using === and runs the matching block. End each case with break, or execution falls through into the next case. A default case runs when nothing matches. Stacking two cases with no code between them lets both share one block.

Worked example

How it reads

Each case is compared with === against phase
break stops the switch after the matching block
default catches every value no case matched

Common mistakes

Forgetting break makes the code fall through and run the next case too.

Cloud tip: A switch reads well when you compare one value against many fixed options. For ranges like score > 90, use if and else if.