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Formulas are used to specify calculations based on values in designated cells. Excel supports basic calculations as well as statistical, trigonometric and other specialized functions.
Formulas used in Excel must follow a certain syntax.
All formulas begin with an equals sign (=).
Some formulas use operands such as +,-, *,/ for addition, subtraction, multiplication or division. For example, the formula =A1+A2+A3 would add the contents of cells A1, A2 and A3.
Other formulas refer to different functions such as SUM, AVERAGE and others. For example, the formula =SUM(A1:A3) would add the contents for the range A1 through A3.
Formulas can be combined with operands. For example, the formula =10*SUM(A1:A3) would add the contents cells A1 through A3 and multiply them by 10.
Functions can be nested within each other. For example, the formula =SQRT(10*SUM(A1:A3)) would take the square root of ten times the sum of cells A1 through A3. When functions are nested, it is important that the number of left parentheses match the number of right parentheses.
Ok - if your question is "What is Excel" - then the answer is that it is a spreadsheet program that allows you the ability to compute data (usually numbers) for example, pulling together a list of hours worked by employees and adding them up automatically. It also can be used to develop sophisticated computational models and I have used it to develop professional services proposal sizing tools using formulas and functions ... which is a good segwey into my other answer.
If your question is "what is a function or formula in Excel" - then the answer is a function or formula in Excel is a collection of mathematical, text, statistical, etc. preprogrammed tools that allows you to manipulate the data you have in your spreadsheet e.g. a SUM() function that adds a series of numbers, and AVERAGE() funtion that computes the average of a series of numbers, etc.
An implementation of the vlookup in Excel could be: You have an Excel
table with student names and their grades. You wish that you could somewhere
in the sheet type a student name, and immediately retrieve his grade (based on
the data in the table). To achieve this, you can use "Vlookup": the function
will look for the student’s name in the first column in the table, and will
retrieve the information that is next to his name in the second column (which is
Hlookup is the same excpet it is for data arranged by rows instead of columns.
Check all the Marks with IF Function if Mark is less than 35 give the total mark else give the rank
here m1,m2,m3 ...are the cells denoting Marks, Totalmark is the cell Showing total marks and Grade is the grade applied for the condition. here also you can use one more if function to find the grade among A,B,C,D,E
First this function check whether any of the given marks are less than 35. if any of the marks is less than 35 it will get the answer TRUE for the OR Function and you will get the Totalmark Cell VAlue, else it will go to Grade Clause.
Vlook up is asoftware tool in built used to look data simultaneously at a time. However, the situation depends on the data you enter- and look up.For example, if you enter a drug name " cough-act" you can have a look at it by just typing key word only with alphabet.