Working with Formulas and Functions Lesson 5 Part 1 Created by: Qusheba Collins

Learning Objectives Build Formulas Copy Formulas Use absolute and relative cell references Edit formulas Use the SUM and AutoSum functions Insert Date Functions Using conditional logic in a formula Understand basic statistical functions Work with three-dimensional functions Created by: Qusheba Collins

Formulas Formulas using the following operators: A formula instructions the software to perform a calculation Example: =A1+A2 Formulas begin with the equal sign (=) or in some cases the plus (+) Formulas using the following operators: Addition: + Division: / Multiplication: * Subtraction: - These are also know as arithmetic operators Created by: Qusheba Collins

Order of Operations Calculations are performed according to the Order of Operations Parentheses Exponents Multiplication and division (from left to right) Addition and subtraction (from left to right) Created by: Qusheba Collins

Order of Operations continued… Ex: In the equation =5+2*3, the result is 11 because the multiplication operation is performed first and then added to the number 5. To change the order of operations, simply place parentheses around the part of the formula to calculated first. Ex: =(5+2)*3, the results are 21 because you add what is in the parentheses first and then multiply it by 3. Created by: Qusheba Collins

Problem Which operation would be performed first in the following equation? =(A8+C9)/(H8-L9) Created by: Qusheba Collins

Formula Bar The formula bar allows you to key in the formula. You may also key a formula directly into a cell. Formulas are not case specific. They may be keyed in upper or lower case. Created by: Qusheba Collins

Building Formulas When entering a formula can use the point and click method, that is similar to entering a formula manually into a cell, instead of using the formula bar. Created by: Qusheba Collins

Using both the equal and plus sign in an equation will give you the same results. Created by: Qusheba Collins

Copying Formulas Copying formulas prevents repeated entry of the same formula. Most formulas contain relative references (cells that will change) that will automatically adjust to the pasted area. Hot Keys Copy: CTRL + C Paste: CTRL + V Created by: Qusheba Collins

Working with Cell References A cell reference indicates a cell’s location and provides instructions for how cell data is copied or used in calculations. Created by: Qusheba Collins

Working with Cell References continued… Relative Cell Reference Absolute Cell Reference A relative cell reference means that the cell value changes “relative” to the cell in which it is copied. An absolute cell reference means that the cell value remains constant when copied to another cell or used in a formula. Ex. $A$3 Toggle Absolute Reference: F4 Created by: Qusheba Collins

Editing Formulas A formula can be edited any time after it has been created. You may change it in the formula bar or by double clicking the cell the formula is located and making the changes there. Hot Key Edit Mode – F2 Created by: Qusheba Collins

Exploring Functions A function is a special formula that does not use arithmetic operators to calculate a result. It is also known as a shortcut formula. An argument is a value that provides information to an action, event, method, property, function, or procedure. Created by: Qusheba Collins

Basic Statistical Functions Addition Function: = SUM() Average Function: =AVERAGE() Maximum Function: =MAX() Minimum Function: =MIN() Count Function: =COUNT() Created by: Qusheba Collins

AutoSum AutoSum allows you select a set of cells relative to cell the function is located in to be added. It resembles the Greek letter sigma and can be found in the editing group on the Home tab. Hot Key: ALT + = Created by: Qusheba Collins

Date Functions =NOW() returns the current date and time format as date and time to be used in calculations rather than a label (constant). =TODAY() returns the current date as a date. We will look at explanation in the Excel help menu to explain how date and time are based upon the computer system’s date and time. Created by: Qusheba Collins

Using Logic in Formulas and Creating a Three- Dimensional Formula will be explained in Part II of the PPT. As of now we will focus on these. Let’s begin creating basic formulas and functions. Created by: Qusheba Collins

Lesson 5: Working with Formulas and Functions Logical and 3D Formulas Lesson 5: Working with Formulas and Functions

Using Logic in Formulas A logical function is one that can return a true value or a false value. They are usually used in doing comparisons and seeing if things are equal to each other or not, or which is higher or lower. The logical functions that Excel provides are: TRUE FALSE AND OR NOT IF Read more: http://wiki.answers.com/Q/Define_logical_function_in_excel #ixzz1YMRb8U4U

Comparison Operators Excel uses comparison operators in logical functions Equal to: = Not equal to: <> Greater than: > Less than: < Greater than or equal to: >= Less than or equal to: <=

IF Statements The IF function returns one value if a condition you specify evaluates to TRUE, and another value if that condition evaluates to FALSE. For example, the formula =IF(A1>10,"Over 10","10 or less") returns "Over 10" if A1 is greater than 10, and "10 or less" if A1 is less than or equal to 10. Syntax: =IF(logical_test,value_if_true,value_if_false)

IF Statement Logical_Test logical_test:    Any value or expression that can be evaluated to TRUE or FALSE. For example, A10=100 is a logical expression; if the value in cell A10 is equal to 100, the expression evaluates to TRUE. Otherwise, the expression evaluates to FALSE. This argument can use any comparison operator.

IF Statements Value_IF_TRUE value_if_true :  The value that you want to be returned if the logical_test argument evaluates to TRUE. For example, if the value of this argument is the text string "Within budget" and the logical_test argument evaluates to TRUE, the IF function returns the text "Within budget." If logical_test evaluates to TRUE and the value_if_true argument is omitted (that is, there is only a comma following the logical_test argument), the IF function returns 0 (zero). To display the word TRUE, use the logical value TRUE for the value_if_true argument.

IF Statements Value_IF_False value_if_false:   The value that you want to be returned if the logical_test argument evaluates to FALSE. For example, if the value of this argument is the text string "Over budget" and the logical_test argument evaluates to FALSE, the IF function returns the text "Over budget." If logical_test evaluates to FALSE and the value_if_false argument is omitted, (that is, there is no comma following the value_if_true argument), the IF function returns the logical value FALSE. If logical_test evaluates to FALSE and the value of the value_if_false argument is omitted (that is, in the IF function, there is no comma following the value_if_true argument), the IF function returns the value 0 (zero).

3D Formula A reference that refers to the same cell or range on multiple worksheets is called a 3D reference. Using 3D formulas allows you to calculate data throughout a workbook using multiple worksheets. All 3D formulas are based on the syntax: Sheet1:Sheet4!A2:B5. A 3D formula is a formula that refers to the same cell (or range of cells) on multiple worksheets. The 3D formula "=SUM(Sheet1:Sheet4!A2)" can be used to add up the numbers in cell "A2" on 4 different worksheets. 3D Formula