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