Interactive control flow
Which branch actually runs?
Set each condition to true or false. Execution stops at the first true branch—exactly as it does in code.
Build the chain
elseFallback branchFollow execution
What the visualizer is showing
An if / else-if chain is ordered. The runtime checks conditions from top to bottom and enters only the first branch whose condition evaluates to true. Every later condition is skipped—even when it would also be true.
That makes order part of your program’s meaning. Put narrower, exceptional cases before broader cases. If you test score >= 50 before score >= 90, a score of 95 reaches the first branch and the distinction for 90-plus is lost.
When to choose something else
Use guard clauses when each branch exits early, a lookup object when exact values map directly to results, or polymorphism when the branch grows because each type has different behaviour. The goal is not to eliminate conditionals; it is to make the decision obvious.