The decimal point is the symbol used to separate the integer part of a decimal number
from its fractional part. In the United States,
the decimal point is denoted with a period (e.g., 3.1415), whereas a raised period
is used in Britain (e.g., 
),
and a decimal comma is used in continental Europe
(e.g., 3,1415). The number 3.1415 is voiced "three
point one four one five," while in continental Europe, 3,1415 would be voiced
"three comma one four one five."
Multiplying by a power of 10, i.e., 
, is equivalent to moving a decimal point 
decimal digits to the right,
and dividing by 
is equivalent to moving a decimal point 
decimal digits to the left.
So, for example, 
,
while 
.
Similarly, multiplying by a power of 
, i.e., 
, in base 
is equivalent to moving the "
-ary point" 
digits to the right. For example,
in binary (
), 
, so 
.
