In mathematics, a dot can represent multiplication or a decimal point.

Mathematicians use a dot in two main ways. First, a centered dot (·) often means multiplication, like 3 · 4 equals 12. Second, a dot placed between numbers acts as a decimal point, which separates the whole number from the fractional part, like 3.14. These uses are universal and help in clear communication of numbers and calculations. Without the decimal point, we couldn't easily write or understand numbers smaller than one.