1. Functions MIS 3406 Department of MIS Fox School of Business
Temple University

2. What is a function in Excel?
=TODAY()
=NOW()
=SUM(A1+B1)
=AVERAGE(A1:A10)
=MIN(A1:A10)
=MAX(A1:A10)
All functions
Have a name
Are passed zero or more pieces of information
Return a value

3. What is a function in Node.js?
A way to organize your code to make it easier to create and maintain
All functions
Have a name
Are passed zero or more pieces of information
Return a value (usually)
Main program just does basic input/output. All of the real work is packaged up and performed in functions

4. A Simple Function
Function
Main Routine

5. A Function That Takes Arguments
Accepting Arguments
Passing Arguments

6. A Function That Returns Data
Value returned by function
Call function and pass arguments
Processing value returned

7. Variable Scope
Local variable “distance”
Global variable “distance”

8. Challenges KilometerConverter SalesTax HowMuchInsurance
AutomobileCosts
PropertyTax
Calories
StadiumSeating
PaintJobEstimator
MonthlySalesTax
FeetToInches
MaximumOfTwoValues
FallingDistance
KineticEnergy
TestAverageAndGrade
EvenOddCounter
PrimeNumber1
PrimeNumber2
FutureValue
RockPaperScissors