Name
Math.log() — compute a natural logarithm
Synopsis
Math
.
log
(
x
)
Arguments
x
Any numeric value or expression greater than zero.
Returns
The natural logarithm of
x
.
Description
Math.log()
computes
log e
x, the natural logarithm of its argument. The
argument must be greater than zero.
You can compute the base-10 and base-2 logarithms of a number with these formulas:
log
10x=
log
10e·
log
exlog
2x=
log
2e·
log
ex
These formulas translate into the following JavaScript functions:
function
log10
(
x
)
{
return
Math
.
LOG10E
*
Math
.
log
(
x
);
}
function
log2
(
x
)
{
return
Math
.
LOG2E
*
Math
.
log
(
x
);
}
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