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IF Function Decision: Action based on condition

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Examples SF State Tuition calculation: –http://bulletin.sfsu.edu/sfstatebulletin/fees/fee/ Fees_and_Expenses –Simple condition PG&E electric charges: –http://www.pge.com/en/myhome/saveenergy money/plans/tiers/index.page –More than one condition

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Examples Simple condition: –If total sales exceeds $300 then applies 5% discount; otherwise, no discount. More than one condition: Taxable Income < =3000 no tax 3000 < taxable income <= 10000 5% tax Taxable income > 1000015% tax Complex condition: –If an applicant’s GPA > 3.0 and SAT > 1200: admitted

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Comparison Less than: < Less than or equal: <= Greater than: > Greater than or equal: >= Equal: = Not equal: <> –At least: >= –At most: <= –No more than: <= –No less than: >= A comparison returns True/False.

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IF Function =IF(condition, ValueIfTrue,ValueIfFalse) Example: –Tuition: If total units <= 12, then tuition = 1200 »Otherwise, tuition = 1200 + 200 per additional unit In Cell C2: IF(B2<=12, 1200, 1200+200*(b2-12))

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Example: Compute weekly wage. Overtime hours are paid 50% more than the regular pay. In Cell D2: If(C2<=40, B2*C2, B2*40 + 1.5*B2*(C2-40))

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Example: Tax rate is based on married status: –Single: 15% –Married: 10% –In D5: If(B5=“S”,$C$1*C5, $C$2*C5)

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Example: A restaurant charges service fee based on this rule: 15% of the check amount with a minimum of $2.

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Exercises 1. The average of two exams is calculated by this rule: 60% * higher score + 40% * lower score. 2. An Internet service provider offers a service plan that charges customer based on the following rules: The first 20 hours: $10 Each additional hour: $1.5

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Nested IF Example: –Rules to determine bonus: JobCode = 1, Bonus=500 JobCode = 2, Bonus = 700 JobCode = 3, Bonus = 1000 –In C2: If(B2=1, 500, If(B2=2, 700, 1000))

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JobCode= 1 Or <> =1 JobCode=2 Or <> 2 1 2 3

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Example Electric Company charges customers based on KiloWatt-Hour used. The rules are: –First 100 KH,20 cents per KH –Each of the next 200 KH ( up to 300 KH), 25 cents per KH –All KH over 300, 30 cents per KH In C2: If(B2<=100,.2*B2,If(B2<=300,.2*100+.25*(B2- 100),.2*100+.15*200+.3*(B2-300))

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What if we have more than 3 conditions Example: Bonus –JobCode = 1, Bonus = 500 –JobCode = 2, Bonus = 600 –JobCode = 3, Bonus = 700 –JobCode = 4, Bonus = 800 –JobCode = 5, Bonus = 1000 –… Other functions: –Table lookup

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Example State University calculates students tuition based on the following rules: –State residents: Total units taken <=12, tuition = 1200 Total units taken > 12, tuition = 1200 + 200 per additional unit. –Non residents: Total units taken <= 9, tuition = 3000 Total units taken > 9, tuition = 3000 + 500 per additional unit.

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Resident or Not Units <= 12 or Not Units <= 9 or Not

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Date & Time Functions How Excel handles dates: –Serial #: 1/1/1900 – day 1 Functions: –Today() – today’s date –Now() – current date and time –Year(a date) –Month(a date) –Weekday(a date)

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Examples Tomorrow’s date? How many days to Christmas? Compute the age given a date of birth.

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Decision Structure - 1 ISYS 350. Decision: Action based on condition Examples Simple condition: – If total sales exceeds $300 then applies 5% discount;

Decision Structure - 1 ISYS 350. Decision: Action based on condition Examples Simple condition: – If total sales exceeds $300 then applies 5% discount;

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