How do I find the absolute value of a number in C++?

I have a float variable fNumber.

How do I find the absolute value of fNumber?

In Excel there is a function called ABS() that will let me find the absolute value.  What is the C++ equivalent?
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    double fabs (      double x );
      float fabs (       float x );
long double fabs ( long double x );

Returns the absolute value of x.


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     double fabs (      double x );
      float fabs (       float x );
long double fabs ( long double x );

/* fabs example */
#include <stdio.h>
#include <math.h>

int main ()
  printf ("The absolute value of 3.1416 is %lf\n", fabs (3.1416) );
  printf ("The absolute value of -10.6 is %lf\n", fabs (-10.6) );
  return 0;

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shaolinfunkAuthor Commented:
thank you!
shaolinfunkAuthor Commented:
maybe you guys could help me with this one too:
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