Floor Function : C++

Floor Function : C++

double floor ( double x );

float floor ( float x );
long double floor ( long double x );

Round down value
Returns the largest integral value that is not greater than x.

Parameters :   x  (Floating point value. )

Return Value: The largest integral value not greater than x.

/* floor example */

#include
#include

int main ()
{
    printf ("floor of 2.3 is %.1lf\n", floor (2.3) );
printf ("floor of 3.8 is %.1lf\n", floor (3.8) );
printf ("floor of -2.3 is %.1lf\n", floor (-2.3) );
printf ("floor of -3.8 is %.1lf\n", floor (-3.8) );
return 0;
}

Output:


floor of 2.3 is 2.0
floor of 3.8 is 3.0
floor of -2.3 is -3.0
floor of -3.8 is -4.0

Other Function:
ceil      :  Round up value (function)

fabs     :  Compute absolute value (function)
modf    :  Break into fractional and integral parts (function)