Logarithms shrink lengthy numbers
You will see later that:
log (10)
=
1
log (0.1)
=
–1
log (100)
=
2
log (0.01)
=
–2
log (1000)
=
3
log (0.001)
=
–3
log (10000)
=
4
log (0.0001)
=
–4
log (100000)
=
5
log (0.00001)
=
–5
log (1000000)
=
6
log (0.000001)
=
–6
You can see that the logarithm of a seven digit number (1000000) is just 6 and that of 0.000001 is -6 only, which are easy to remember and deal with.