# Exp

Returns e raised to the power of number. The constant e equals 2.71828182845904, the base of the natural logarithm.

See also Log and Log10.

### Syntax

    Exp(number)

##### number

Exponent applied to the base e.

### Usage

To calculate powers of other bases, use ^ (the exponentiation operator). Exp is the inverse of Log, the natural logarithm of number.

### Examples

    <!--- This example shows how to use Exp --->
    <HTML>
    <HEAD>
    <TITLE>
    Exp Example
    </TITLE>
    </HEAD>

    <BODY BGCOLOR=silver>
    <H3>Exp Example</H3>

    <CFIF IsDefined("FORM.Submit")>
    <CFOUTPUT>
    <P>Your number, #FORM.number#
    <BR>#FORM.number# raised to the E power: #exp(FORM.number)#
    <CFIF FORM.number LTE 0><BR>You must enter a positive real number to
    see the natural logarithm of that number<CFELSE><BR>The natural logarithm
    of #FORM.number#: #log(FORM.number)#</CFIF>
    <CFIF FORM.number LTE 0><BR>You must enter a positive real number to
    see the logarithm of that number to base 10<CFELSE><BR>The logarithm of
    #FORM.number# to base 10: #log10(FORM.number)#</CFIF>
    </CFOUTPUT>
    </CFIF>
    <CFFORM ACTION="exp.cfm" METHOD="POST">
    Enter a number to see its value raised to the E power,
    the natural logarithm of that number, and the logarithm of
    number to base 10.
    <CFINPUT TYPE="Text" NAME="number" MESSAGE="You must enter a number"
      VALIDATE="float" REQUIRED="No">
    <INPUT TYPE="Submit" NAME="Submit">
    </CFFORM>

    </BODY>
    </HTML>