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    FUNCTIONS

                      A function is a predefined formula in Excel. It starts with the = (equal) sign. Functions are used
                      for computing complex calculations. There are many built-in functions provided by Excel. They
                      accept arguments and return values.

                      Arguments are inputs to the functions. The values should be given in between opening and closing
                      ( ) parenthesis. For example, SUM(A1:A5) A1 and A5 are arguments and Sum is a function.
                      Some rules for using functions are:

                         All Excel functions must begin with = sign

                         Function name must be a valid Excel name.
                         Function must be followed by opening and closing parentheses.

                         Most of the functions must contain atleast one argument within it.

                      Let’s discuss the categories of function.

                      MATHEMATICAL FUNCTIONS
                      Some mathematical functions with their examples are given below:

                              Function                         Purpose                                Example

                                                                                             Input: =SUM(4,8,12,16)
                       SUM(range)             It returns the sum of a range.
                                                                                             Output: 40
                                                                                             Input: =PRODUCT(4,2,8)
                        PRODUCT(range)        It multiplies the values in a range of cells.
                                                                                             Output: 64

                        MOD                   It returns the  remainder  after a number  is  Input: =MOD(8,5)
                        (number, divisor)     divided by the divisor.                        Output: 3

                                                                                             Input: =SQRT(81)
                        SQRT(number)          It returns the square root of the given number.
                                                                                             Output: 9
                                                                                             Input: =INT(14.25)
                        INT(number)           It rounds the number to an integer value.
                                                                                             Output: 14

                        POWER                 It  returns the  result  of  a  number  raised  to  Input: =POWER(5,3)
                        (number, power)       some power.                                    Output: 125

                        ROUND(number,         It  returns a  number  after rounding  to  the  Input: =ROUND(35.666,2)
                        number of digits)     specified digits.                              Output: 35.67

                                                                                             Input: =ABS(–25)
                        ABS(number)           It returns the absolute value of a given number.
                                                                                             Output: 25

                       12   Premium Edition-VI

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