decimal number

Has a dot

A decimal number is a number written in base-10 notation, the standard system using digits 0–9 where each position represents a power of ten.

More commonly, the term refers specifically to numbers containing a decimal point: Pi is approximately 3.14159, a decimal number with infinite digits.

In this narrower sense, decimal numbers contrast with whole numbers or integers.

Related
  • denaryBased on ten
  • pointExact location or meaning
  • centsDollar subdivisions
  • digitSingle numeric character
  • baseSupporting bottom structure

truncate · radix · floating-point · precision · place value · ten · rounding · comma · percentages · hundredth · arithmetic · addition · long division · math class · convert · calculator · currency · notation

Opposites
numerical representation form

decimal numberinteger

Number lacking fractions

whole number · natural number · counting number · round number

number base system

decimal numberbinary number

Quantity expressed in zeros and ones

numerical exactness

decimal numberfraction

Part divided by whole

common fraction · Roman numeral · mixed number · percentage

Family

number, decade, decimal, numeral, enumerate, decimate, numerate, decimals, decimalization

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G