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Tip Calculator exercise for DMD 3475
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Tip Calculator

An exercise in JavaScript function definitions and return values. Course: DMD 3475.


Our tip calculator application is almost complete. Our function named updateValues() will fetch the values that were input by the user.

At that point, the values are passed as arguments to two functions named calculateTipPerPerson() and calculateTotalPerPerson(). The values that are returned by each function are used to update the DOM.


  1. Define both required functions: calculateTipPerPerson() and calculateTotalPerPerson().
  2. Each function should accept the 3 arguments being passed to them within the updateValues() function.
  3. Using those values, calculate and return the appropriate answer.
  4. Extra credit: Properly round the dollars and cents that are returned by your functions.

Helpful Information

  • Search Google for "Tip Calculator" to see the desired functionality for this application.
  • The calculateTotalPerPerson() function should return a value that includes the tip.
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