1. Day 3: Formulas Aniko Balogh CEU Computer & Statistics Center balogha@ceu.edu

2. Types of data In each cell there may be the following data types: – Labels -- (text with no numerical value) – Number data (constant values) – Formulas (mathematical equation used to calculate) Data TypesExamplesDescriptions LABEL Name or Wage or Days anything that is just text CONSTANT5 or 3.75 or -7.4any number FORMULA=5+3 or = 8*5+3math equation

3. Basic formulas Formulas are math equations that CALCULATE a value to be displayed. You must have an equals sign ( = ) as the first character in a cell that contains a formula. The = sign tells excel that the contents of the cell is a formula Without the = sign, the formula will not calculate anything. It will simply display the text of the formula.

4. 4 Explicit values and cell references You can use both explicit values and cell references in a formula: –Formula with only cell references:=a1*b1 –Formula with only literal values:=100/27 –Formula with both cell references and literal values: =a1/100

5. Absolute and Relative References By default, all cell references are relative references. When copied across multiple cells, they change based on the relative position of rows and columns. For example, if you copy the formula =A1+B1 from row 1 to row 2, the formula will become =A2+B2. Relative references are especially convenient whenever you need to repeat the same calculation across multiple rows or columns.

6. Absolute references There may be times when you do not want a cell reference to change when filling cells. Absolute references do not change when copied or filled. You can use an absolute reference to refer to the same cell. An absolute reference is signed by the dollar sign. ($)

7. Basic Math Functions multiply, divide, add and subtract.

8. Practice Download the practice 2 file Calculate the monthly Total cost in HUF Calculate it in EUR with absolute referencing

9. Sources Free Computer Tutorials: http://www.homeandlearn.co.uk/excel2007/E xcel2007.html Microsoft Official Page: https://support.office.com/ https://support.office.com/ Excel Easy#1 Excel tutorial on the net Excel EasyExcel tutorial http://www.excel-easy.com/basics.html