A brief note on functions used in spreadsheets
The use of functions in spreadsheets make the otherwise complex procedures relatively simple. Some of the commonly used functions are,
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  ISBLANK() 
ISBLANK function could be used to check for null values or blank values. Syntax:- ISBLANK(value) Parameters: 'value' indicates what is to test. The function returns TRUE if value is blank and FALSE if value is not blank. 
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 PROPER() 
PROPER function is to set the first letter of each word into uppercase and the rest of them into lower case. Syntax: PROPER(text) Parameters: The 'text' indicates the string whose first letter to convert into upper case and rest of the letters to lower case. 
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   ISNUMBER() 
ISNUMBER function to check whether the value is numeric or not. Syntax: ISNUMBER(value) Parameters: 'value' indicates the value to test and if it is a number then the function returns TRUE and if not the function returns FALSE. 
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   LEN()
LEN function to return the length of the specified string. Syntax: LEN(text) Parameters: 'text' indicates the string whose length is the return. 
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   TODAY() 
TODAY function to return the current date. Syntax: TODAY() 
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   VALUE()
VALUE function converts a numeric text value to number. Syntax: VALUE(text) Parameters: 'text' indicates the return value as a number and if the value is not a number then the function returns #VALUE!. 
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   COLUMNS()
COLUMNS function returns the number of columns of a given reference. Syntax: COLUMNS(Array) Parameters: Array is the reference to a cell range whose total number of columns found. 
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   HYPERLINK() 
HYPERLINK function to pass a URL as the parameter and on clicking a cell with HYPERLINK function the hyperlink opens. Syntax: HYPERLINK("URL")Parameters: URL specifies the link. 
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   DDE 
Returns DDE-based link as the result. Syntax: DDE("Server";"File";"Range";Mode)Parameters: Server specifies the name of the server application. File is the file to search for. Range is the area to search for the data. Mode is a parameter that controls the method by which the DDE server converts its data into numbers. This parameter is optional. 
 
     
         
        