Function
log — natural logarithm
Synopsis
log(val: number) -> float64
Description
The log function returns the natural logarithm of its argument val, which
takes a numeric type. The return value is a float64 or an error.
Negative values result in an error.
Examples
The logarithm of various numbers
# spq
values log(this)
# input
4
4.0
2.718
-1
# expected output
1.3862943611198906
1.3862943611198906
0.999896315728952
error({message:"log: illegal argument",on:-1})
The largest power of 10 smaller than the input
# spq
values (log(this)/log(10))::int64
# input
9
10
20
1000
1100
30000
# expected output
0
1
1
2
3
4