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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)
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