CS&E 1111 ExIFs IFs and Nested IFs in Excel Objectives: Using the If function in spreadsheets Nesting If functions.

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Presentation transcript:

CS&E 1111 ExIFs IFs and Nested IFs in Excel Objectives: Using the If function in spreadsheets Nesting If functions

CS&E 1111 ExIFs The IF function l The IF function is a logical function used for making decisions based on some condition(s) l Conditions have to result in Boolean values. (relational expressions, true/false) l Lends more flexibility since the results can be something else besides a simple True - False value If your total points are less than 600 then display “Fail” in the cell otherwise display “Pass”

CS&E 1111 ExIFs The IF function syntax = IF(logical_test, value_if_true,value_if_false) The IF function has 3 arguments - the first two are required l First argument : is any value or expression that can be evaluated to TRUE or FALSE. l Second argument: the value that is returned if logical_test is TRUE (then) l Third argument: the value that is returned if logical_test is False (else) – this argument is optional Sometimes you may see the statement described as If (, if true then, else )

CS&E 1111 ExIFs A simple IF formula l Write a formula in cell G4 to list whether this is an honor student as indicated by the letter H or a non- honor student as indicated with the letter R. =IF(F4, “H”, “R”) or IF(F4=FALSE, “R”, “H”) l What would result if the “” marks around the letter H were omitted?.. Try it and see.

CS&E 1111 ExIFs Examples – IF’s with relational expressions as conditions l Write a formula in cell F4 to determine if Blue passed or failed (a minimum of 300 points is required to pass) =IF(E4>=300, “pass”, “fail”) or IF(E4<300, “fail”, “pass”) l Write a formula in cell G4 to determine Blue’s curved grade. If the grade is below 150 add 10%, if the grade is 150 or above the grade remains the same =IF(E4<150, E4*1.1, E4)

CS&E 1111 ExIFs l Write a formula in cell F4 to determine if Blue got an A - to get an A Blue needs to have the highest score on all 3 exams =IF(And(B4=B8,C4=C8,D4=D8), “A”) l Write a formula in cell F4 to determine if Blue got a B. To get a B Blue needs to have a total score higher than the class average - otherwise he gets a C =IF(E4>Average(E4:E6), “B”, “C”) IF’s with Boolean and Arithmetic functions in the condition

CS&E 1111 ExIFs If Blue has at least 350 points he will get an A, else if he has less than 350 points but at least 300 points he will get a B, otherwise he gets a “C” How can you write a formula that requires a series of conditions to be evaluated each dependent upon the results of the previous condition?

CS&E 1111 ExIFs Before designing a nested-if formula – Use a logic diagram (Decision Tree) to understand the logic. Does Blue have at least 350 points? True False Blue gets an A Does Blue have at least 300 points? True False Blue gets a B Blue gets a C 1 st If statemen t 2 nd If statemen t

CS&E 1111 ExIFs NESTED IF The second argument and/or third argument of an IF statement can be another IF statement - up to 64 levels of nesting! Here is an example with 2 levels of nesting – so three outcomes are possible. IF (Blue has at least 350 points, then he gets an A, else IF ( Blue has at least 300 points, then he gets a B, else he gets a C ) )

CS&E 1111 ExIFs Nested IF Example =If(E4>=350, “A”, IF(E4>=300, “B”, “C”)) Write a formula in cell F4: If Blue has at least 350 points he gets an “A”, if he has less than 350 points but at least 300 points he gets a “B”, otherwise he gets a “C” 1 st logical testValue-if-TrueValue-if-False is a nested If

CS&E 1111 ExIFs Now apply letter grades based on this grading scheme =If(E4>=grades!B$2, grades!A$2, If(E4>=grades!B$3, grades!A$3, If(E4>=grades!B$4, grades!A$4, If(E4>=grades!B$5, grades!A$5, grades!A$6)))) grades!

CS&E 1111 ExIFs Order matters with criteria that are not mutually exclusive =If(E4>340, “X”, IF(D4>=160, “Y”, “none”)) Blue gets scholarship A if he received more than 340 points, if he didn’t get scholarship X but has at least 160 points on the final he’d get scholarship Y – otherwise no scholarship. 1 st logical testValue-if-TrueValue-if-False is a nested If

CS&E 1111 ExIFs What to remember about using IF’s l An IF function allows you to make a decision based on a criteria. The first argument contains the logical_test, the 2 nd the value-if-true and the 3 rd (optional) the value-if-false. l For any IF statement, either the second argument (TRUE) or third argument (FALSE) is applied, not both. l Consider if the criteria are not mutually exclusive this will affect the order of the arguments. l In a Nested IF statement, each IF must be complete with all required arguments specified and a corresponding set of ( ).