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MONTEGO BAY HIGH SCHOOL INFORMATION TECHNOLOGY THE EXCEL IF FUNCTION

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OBJECTIVES Students should be able to.. 1 Design logical test conditions 2Use the If Function to manipulate figures in a spreadsheet

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The IF Function The IF function is one of Excel’s most useful and most used functions. What it does, basically, is test to see whether a certain condition is true or false. If the condition is true, the function will do one thing, if the condition is false, the function will do something else.

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The Syntax The basic form or syntax of the function is:syntax =IF(logic test, value if true, value if false)

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The Logic Test Excel's logic functions always involve a comparison between two values. The logic test can only return a true or false answer, depending on the condition tested. The Comparison Operators The comparison operators that can be used in a logic test are: Equals ( = ) Less than ( ) Greater than or equal to ( > = ) Not equal to ( )

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Logical Test Cont…. Examples The logic test can be a comparison between two cell references such as: A3 > B3 Or the logic test can be a comparison between a cell reference and a fixed amount such as: C4 < = 100

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Performing calculations The IF function can perform different calculations depending on whether the function returns a true value or not..

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Eg =IF(A4>=100,Value_if_true,Value_if_false) If The value in Cell A4 is > 100 or = to 100 (the logical test is true and Value_if_true will be displayed If the value in cell A4 is > 100 the logical test is false and value_if_false will be displayed.

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The example below uses different deduction rates in its calculations based on employee income. =IF(A5 < 29701, A5 * 15%, A5 * 25%) The logical test is A5<29701 Value_if_true is A5 *15% Value_if_false is A5*25% Notice 1 0f two values will be displayed depending on wither the logical test is true or false.

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=IF(A5 < 29701, A5 * 15%, A5 * 25%) If the value in cell A5 is less than or equal to 29701, the value in cell A5 will be multiplied by 15% (TRUE) If the value in cell A5 is greater than 29701, the value in cell A5 will be multiplied by 25% (False)

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CALCULATING PAYE 1If an applicant earns $5000.00 or less no PAYE is deducted. 2This base figure is called an income tax threshold. 3Income tax is calculated on the amount exceeding $5000.00 4Therefore if an applicant’s salary is $5100, PAYE is calculated on (5100-5000) or on 100. NOT $5100.00.

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Calculating PAYE cont…… 1Build a logical test, one that will determine wither the salary is equal to or less than $5000.00 2Build an expression for value_if_true, that is an expression that will calculate the PAYE if it is equal to or less than $5000.00 3Build an expression for value_if_false, that is an expression that will calculate the PAYE if the salary is greater than $5000.00

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Displaying non numeric values using the IF function. Non numeric values are placed in open and closed quotation marks. Eg =if(A4>=50, “Blue”,”Black”) If true the word Blue will be displayed If false the word Black will be displayed

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