# How to use the EXP function in Excel In this article, we will learn How to use the EXP Function in Excel.

What are exponents in Excel ?

In simple words, the exponent of a number is, the number of times the number gets multiplied.

= 23  (In Mathematics) = 8

= 2 ^ 3 (In Excel) =  8

Caret ( ^ ) sign is used to take the POWER of a number. To use this method first start with equals ( = ) sign  and then use the caret ( ^ ) sign between the numbers, to Power. As shown in the above snapshot the 2 Power of 5 comes out to be 25, which is 5 x 5 equals 25.

There are 3 ways to use Power of a number in Excel.

1. Use the multiply character ( ^ )
2. Excel POWER function
3. Use the EXP function only to get powers of e (e = 2.7128..).

e is a euler number invented by John Napier. It is an irrational number written as e = 2.718281828459... . This is generally used as the base of the natural logarithmic function. This is a very valuable mathematical number and widely used in mathematics. Let's learn more about EXP function syntax and an example to illustrate the function usage.

EXP Function in Excel

EXP function returns a number when number 2.7128… which is e gets the power of number n. For example when =e * e * e = e^3 or can be extracted using the below function =EXP(3).

Syntax:

 =EXP(number)

number : any numerical value

Example :

All of these might be confusing to understand. Let's understand how to use the function using an example. Here we have some numbers to give input for EXP function. Use the formula:

 =EXP(1)

The value returned here will the value of e. Use the formula in other cells to get the powers of irrational constant “e”. As you can see, the function returns the value of e and its power. LN function is a type of mathematical function which also uses irrational number as base. Let's check out below

LN function in Excel

Here we have numbers in Column A. we need to find the LN of these numbers. These numbers are generated using EXP functions as we can’t get the constant value of “e” in Excel. Use the formula

 =LN(A2)

Here LN returns the Logarithmic value in A2 at base “e”. e1= 2.7128..

1 = loge(e)

The above stated equation stats that LN(e) = 1

Now we will apply the formula to other cells to get the LN of all numbers. As you can see LN function returns the logarithmic of the numbers at base e.

Here are all the observational notes using the EXP function in Excel
Notes :

1. Any non numeric value given as input will return as error by function
2. You can feed the arguments to the function directly or using the cell reference as explained in the example.

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