shithub: riscv

ref: 1edd8d28a56578307df36967d51f16703d8f33bd
dir: /sys/man/2/exp/

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.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)