NAME

exp, log, log10, pow, sqrt, cbrt − exponential, logarithm, power, square root functions

SYNOPSIS

#include <math.h>

double exp (x)
double x;

double log (x)
double x;

double log10 (x)
double x;

double pow (x, y)
double x, y;

double sqrt (x)
double x;

double cbrt (x)
double x;

DESCRIPTION

exp returns ex.

log returns the natural logarithm of x. The value of x must be positive. 

log10 returns the logarithm base ten of x. The value of x must be positive. 

pow returns xy. If x is zero, y must be positive.  If x is negative, y must be an integer. 

sqrt returns the non-negative square root of x. The value of x may not be negative. 

cbrt returns the cube root of x. 

SEE ALSO

hypot(3M), sinh(3M)

DIAGNOSTICS

exp returns Infinity when the correct value would overflow, or 0 when the correct value would underflow. 

log and log10 return NaN when x is non-positive. 

pow returns NaN when x is 0 and y is non-positive, or when x is negative and y is not an integer.  When the correct value for pow would overflow or underflow, pow returns Infinity or 0 respectively

sqrt and cbrt return NaN.

September 02, 1992