1.Grade a scoreexercise · easy · 15 min
Given the score stored in `score`, write an if/else if/else chain that sets #result to "A" (90+), "B" (80-89), or "C" (below 80). With score = 87, the result should read "B".
Passes when: #result should read "B" for a score of 87.
2.Check even or oddexercise · easy · 15 min · practice plan
Given the number stored in `number`, set #result to "Even" if it divides evenly by 2, otherwise "Odd". With number = 17, the result should read "Odd".
Passes when: #result should read "Odd" for 17.
3.Check access by roleexercise · easy · 15 min · practice plan
Given the role stored in `role`, if it equals "admin" set #status to "Access granted" and add the class "granted" to #status; otherwise set it to "Access denied" and add the class "denied". With role = "admin", access should be granted.
Passes when: #status should read "Access granted"; #status should have the class "granted".
4.Suggest clothing for the weatherexercise · easy · 15 min · practice plan
Given the temperature (in Celsius) stored in `temperature`, set #advice to "Wear a coat" below 10, "Wear a light jacket" from 10 up to (but not including) 25, or "Wear a t-shirt" at 25 and above. With temperature = 15, the advice should be "Wear a light jacket".
Passes when: #advice should read "Wear a light jacket" for 15°C.
5.Apply a bulk discountexercise · easy · 15 min · practice plan
Given the cart total stored in `cartTotal`, if it's $100 or more apply a 10% discount and show the new total in #total as "Total: $108"; otherwise show the total unchanged. With cartTotal = 120, the discounted total is 108.
Passes when: #total should read "Total: $108".
6.Fix the assignment instead of comparisonbug fix · easy · 15 min
This access check always grants access, no matter the role, because the condition uses = (assignment) instead of === (comparison). Fix the operator so role = "guest" is correctly denied.
Passes when: With role = "guest", #status should read "Access denied"; #status should have the class "denied".
7.Fix the backwards temperature checkbug fix · easy · 15 min · practice plan
This should recommend a coat below 10°C, but the comparison is backwards, so it recommends a coat above 10°C instead. Fix the operator. With temperature = 4, a coat should be recommended.
Passes when: With temperature = 4, #advice should read "Wear a coat".
8.Fix the discount boundarybug fix · easy · 15 min · practice plan
Orders of exactly $100 should qualify for the 10% discount, but the condition uses > instead of >=, so a $100 order is excluded. Fix the operator. With cartTotal = 100, the total should become $90.
Passes when: With cartTotal = 100, #total should read "Total: $90".
9.Fix the swapped even/odd labelsbug fix · easy · 15 min · practice plan
This checker has its labels swapped: it says "Even" when the remainder is non-zero. Fix the logic so odd numbers are correctly labeled "Odd". With number = 17, the result should read "Odd".
Passes when: With number = 17, #result should read "Odd".
10.Fix the grade chain's check orderbug fix · easy · 15 min · practice plan
This grade calculator checks the 80+ range before the 90+ range, so a 95 incorrectly gets graded "B". Reorder the checks from highest to lowest so 95 correctly gets "A".
Passes when: With score = 95, #result should read "A".
11.Branch on a numberexercise · easy · 10 min · practice plan
Show "pass" when the score is 70 or more, otherwise "fail". Score is 82.
Passes when: #out should show pass.
12.Branch on a booleanexercise · easy · 10 min · practice plan
Show "on" or "off" for a switch that is currently false.
Passes when: #out should show off.
13.Pick the larger numberexercise · easy · 10 min · practice plan
Show the larger of 14 and 9.
Passes when: #out should show 14.
14.Detect an even numberexercise · easy · 10 min · practice plan
Show "even" or "odd" for the number 8.
Passes when: #out should show even.
15.Use a ternary insteadexercise · medium · 10 min · practice plan
Rewrite a simple branch as one line: 5 is less than 10, so show "small".
Passes when: #out should show small.
16.Fix the swapped branchesbug fix · easy · 8 min · practice plan
The two outcomes are the wrong way round.
Passes when: #out should show pass.
17.Fix the off-by-one boundarybug fix · easy · 8 min · practice plan
A score of exactly 70 should pass, but it fails.
Passes when: #out should show pass.
18.Fix the even checkbug fix · easy · 8 min · practice plan
The remainder test is comparing against the wrong value.
Passes when: #out should show even.
19.Fix the negated booleanbug fix · easy · 8 min · practice plan
The ! makes the wrong branch run.
Passes when: #out should show off.
20.Fix the ternary orderbug fix · easy · 8 min · practice plan
The two ternary outcomes are reversed.
Passes when: #out should show small.
