Round to the nearest — practice exercise

What you'll be asked to do

1. 1.Round to the nearestexercise · easy · 10 min

   Report four point five rounded.

   Passes when: #out should show 5.

2. 2.Always round downexercise · easy · 10 min · practice plan

   Report four point nine rounded down.

   Passes when: #out should show 4.

3. 3.Always round upexercise · easy · 10 min · practice plan

   Report four point one rounded up.

   Passes when: #out should show 5.

4. 4.Count the pages neededexercise · easy · 10 min · practice plan

   Work out how many pages hold 23 items at ten per page.

   Passes when: #out should show 3.

5. 5.Round to two decimalsexercise · medium · 10 min · practice plan

   Round pi to two decimal places as a number.

   Passes when: #out should show 3.14.

6. 6.Fix floor used for pagesbug fix · easy · 8 min

   Rounding down loses the last partial page.

   Passes when: #out should show 3.

7. 7.Fix the negative rounded wronglybug fix · easy · 8 min · practice plan

   floor goes further down on a negative; trunc just cuts.

   Passes when: #out should show cut to -4.

8. 8.Fix the decimal roundingbug fix · easy · 8 min · practice plan

   Multiply before rounding, then divide back.

   Passes when: #out should show 3.14.

9. 9.Fix ceil used where floor belongsbug fix · easy · 8 min · practice plan

   Whole units should round down, not up.

   Passes when: #out should show 4.

10. 10.Fix toFixed used where a number is neededbug fix · easy · 8 min · practice plan

    toFixed returns a string, so the arithmetic joins instead.

    Passes when: #out should show 8.

Between them these tasks cover round, floor and ceil.

Looking for a different chapter? See every practice set, or switch to the interview theory questions.