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Functions

Functions. Computer Applications. What is a function formula?. Special formula that does NOT use operators (e.g. +, -, *, etc.) to calculate a result Performs complex calculations in mathematics, trigonometry, statistics, logic, accounting and finance.

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Functions

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  1. Functions Computer Applications

  2. What is a function formula? • Special formula that does NOT use operators (e.g. +, -, *, etc.) to calculate a result • Performs complex calculations in mathematics, trigonometry, statistics, logic, accounting and finance. • Made of three parts: 1. Equals sign 2. Function name 3. Argument • Argument: value, cell reference, range or text that acts as an operand in the function formula

  3. Mathematical and Trigonometric Functions • Square Root • SQRT(number) • Example: =SQRT(A13) or =SQRT(22) • Round • Displays the rounded value of a number to the number of places designated by the second argument • Example: =ROUND(122.778, 1) would display 122.8

  4. One Last Mathematical Function and Some Statistical Functions Too! • Natural Log (last math function) • =LN(50) would display 1.69897 • Average (on to statistical stuff) • Displays the average of a range of cells • Example: =AVERAGE(E4:E9) • Count • Counts the number of cells that have something typed in them • Example: =COUNT(E4:E9) => Result would be 6 if all cells had something in them, 5 if one was blank

  5. More Statistical Functions • Maximum • Displays the largest number in a range • Example: =MAX(A2:B5) • Minimum • Displays the smallest number in a range • Example: =MIN(A1, D5, Z8, BB2) • Standard Deviation and Variance • Example: =STDEV(A2, B7) • Example: =VAR(F1:F9)

  6. Financial Functions • Future Value • What will a monthly investment of $50 be worth in 10 years if a savings account pays 1% APR? • FV(rate, nper, pmt) • rate is the interest rate. If you make yearly payments, leave it as is (e.g. 1%). If you make monthly payments, divide the rate by 12.

  7. Future Value (cont.) • nper is the number of periods. If you make yearly payments, your period stays as is (e.g. 10 years). If you make monthly payments, you multiply by 12. • pmt is the amount that is going out of your pocket. It does not need to be modified for years or months. • =FV(.01/12, 10*12, -50)

  8. Present Value and Payment • “How much car can I afford?” • You know you can afford $200/month car payment. The going rate for car loans is 5 years at 5.5% APR. • PV(rate, nper, pmt) • =PV(.055/12, 5*12, -200) • Payment • What will be the payment on a $20,000 car with a loan of 5 years, 5.5% APR? • PMT(rate, nper, pv) • =PMT(.055/12, 5*12, -20000)

  9. Date, Time, and Text Functions • Date • Displays the date in a variety of formats, such as 12/17/03 or December 17, 2003 • =DATE(year, month, day) • Now • Displays the current date or time based on the computer’s clock • =NOW() will result in 5/23/03 10:05

  10. Repeat • Displays the text (first argument) a specified number of times (second argument) • Example: =REPT(B6, 4) • Say the number 3 was in B6 • This cell would display 3333

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