GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
Unix |
Unix v7 |
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exp(3m) |
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exp, log, log10, pow, sqrt − exponential, logarithm, power, square root
#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;
Exp returns the exponential function of x.
Log returns the natural logarithm of x; log10 returns the base 10 logarithm.
Pow returns x y .
Sqrt returns the square root of x.
hypot(3), sinh(3), intro(2)
Exp and pow return a huge value when the correct value would overflow; errno is set to ERANGE. Pow returns 0 and sets errno to EDOM when the second argument is negative and non-integral and when both arguments are 0.
Log returns 0 when x is zero or negative; errno is set to EDOM.
Sqrt returns 0 when x is negative; errno is set to EDOM.
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exp(3m) | |