ref: e147e0e84cc68febb65db0bdbfde7ae3e10c6ce4
dir: /sys/man/2/exp/
.TH EXP 2 .SH NAME exp, log, log10, pow, pow10, sqrt \- exponential, logarithm, power, square root .SH SYNOPSIS .B #include <u.h> .br .B #include <libc.h> .PP .nf .B double exp(double x) .PP .B double log(double x) .PP .B double log10(double x) .PP .B double pow(double x, double y) .PP .B double pow10(int n) .PP .B double sqrt(double x) .fi .SH DESCRIPTION .I Exp returns the exponential function of .IR x . .PP .I Log returns the natural logarithm of .IR x ; .I log10 returns the base 10 logarithm. .PP .I Pow returns .if t .I x\u\s8y\s10\d .if n x^y, and .I pow10 returns .if t .I 10\u\s8n\s10\d .if n 10^n as a double. .PP .I Sqrt returns the square root of .IR x . .SH SOURCE All these routines have portable C implementations in .BR /sys/src/libc/port . Most also have machine-dependent implementations, written either in assembler or C, in .BR /sys/src/libc/$objtype . .SH SEE ALSO .IR hypot (2), .IR sinh (2), .IR intro (2)