Real constants and functions: Difference between revisions

=={{header|C}}==

Most of the following functions take a double; for each of them there are corresponding ones with "f" or "l" appended to the name that take a float or long double, respectively.

<c>#include <math.h>

M_E; /* e - not standard but offered by most implementations */

M_PI; /* pi - not standard but offered by most implementations */

sqrt(x); /* square root--cube root also available in C99 (cbrt) */

log(x); /* natural logarithm--log base 10 also available (log10) */

exp(x); /* exponential */

abs(x); /* absolute value (for integers) */

fabs(x); /* absolute value (for doubles) */

floor(x); /* floor */

ceil(x); /* ceiling */

pow(x,y); /* power */</c>