log10

The base ten logarithm. Gives the number of digits in the number before the decimal point. On zero, returns -inf. Below zero, returns NaN, a special value that always causes failure when compared to other numbers. (ie. (NaN<0) ⇒ false, (NaN>=0) ⇒ false)

• log10(x) = log(x, 10)
• log10(x)/log10(e) = ln(x)
• log10(2)=0.3010-ish
• log10(e)=0.4343-ish
• log10(10)=1

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-1 log10 trace #NaN
0 log10 trace #-inf
1 log10 trace #0
10 log10 trace #1
100 log10 trace #2