Library Function exp in Math Class in C
Library Function exp of math.h Header File
On this page we will discuss about library function exp in math class which is used in C.
The C header file math.h contains the standard math library functions that can be used for performing various mathematical operations. The exp function evaluates e (2.71828) raised to the power of the given argument and returns the output.
Library Function exp of math.h Header File
In C programming language the exp function is included in math.h header file.
The range of input argument which is passed to exp function is not limited here as it can be any value from int to float or double but then has to be type casted into double type.
Declaration of exp function
double exp(double x)
Parameters of exp function
The exp function accepts a single input argument which is a double value.
| Parameter | Description |
|---|---|
| double value | This value of double function ranges from all positive to all negative numbers. |
Return value of exp function
The exp function returns a value in which is the result of exponent e to the argument x and it’s type is double.
| Parameter | Return Value |
|---|---|
| Exponent e raised to power of argument | It returns the value in double type.. |
Implementation of Library Function math.h exp
Example 1:
The following code shows the use of exp function.
#include<stdio.h>
#include<conio.h>
int main() {
double x = 12.0, result;
result = exp(x);
printf("Exponential of %.2lf = %.2lf", x, result);
return 0;
}
Output:
Enter the value of x to find e^x: 12 Exponential of 12.00 = 162754.79
Example 2:
#include<stdio.h>
#include<conio.h>
int main () {
double x = 0;
printf("The exponential value of %lf is %lf\n", x, exp(x));
printf("The exponential value of %lf is %lf\n", x+1, exp(x+1));
printf("The exponential value of %lf is %lf\n", x+2, exp(x+2));
return(0);
}
Output:
The exponential value of 0.000000 is 1.000000 The exponential value of 1.000000 is 2.718282 The exponential value of 2.000000 is 7.389056
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