The use of ABS () function and exp () function in C language _c language

C language ABS () function: Find absolute value (integer)
header file:

#include <stdlib.h>

To define a function:

int abs (int j);

Function Description: ABS () is used to calculate the absolute value of the parameter J, and then return the result.

Return value: Returns the absolute result of the parameter J.

Example

#ingclude <stdlib.h>
Main () {
  int ansert;
  Answer = ABS ( -12);
  printf ("|-12| =%d\n ", answer);
}

Perform

|-12| = 12

C language exp () function: The second power function of E (the x-th square value at the end of E)
header file:

 #include <math.h>

EXP () is used to calculate the X-square value, the ex value, at the base of E, and then return the result. Its prototype is:

 Double exp (double x);

return value returns the X-square calculation of E.

Note that when compiling with GCC, please join-LM.

"Instance" calculates the value of the 10-second side of E.

#include <math.h>
Main () {
 double answer;
 Answer = exp (ten);
 printf ("e^10 =%f\n", answer);
}

Run Result:

E^10 = 22026.465795