{{keywords>wiki library source code example reference}}
====== exp ======

<code c>
    double exp(double);
</code>
calculates the exponential value of a number

===== C Sourcecode Example =====
compile in linux with: gcc exp.c -o exp **-lm** -Wall
<code c>     
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */

#include <math.h> /* including math library */

int main ( void ) 
{
double x;
x = 9.0;
printf("the exponential value of %f is %f\n", x, exp(x));
return 0;
}

</code>

==== output ====
   output:
   user@host:~$ ./exp 
   the exponential value of 9.000000 is 8103.083928